In the interview, he talked a lot about what had changed in the five months since HP completed its purchase of Palm. A bunch of Palm workers have left, but Rubinstein noted that the unit has made more than 70 new hires and brought over more than 200 people from HP. The company has also shifted its focus to include tablets and printers and other types of mobile devices–something the underfunded standalone company wasn’t even considering doing.

“We were looking strictly at phones,” Rubinstein acknowledged, while maintaining that the webOS itself is designed to scale.

Here is an edited transcript of our conversation:

Mobilized: When you guys were a standalone company, were you focused on phones? Or were you already looking at tablets and other kinds of devices?

Rubinstein: We were looking strictly at phones. We were a small company, but when we designed webOS we designed it to be scalable. To build a great tablet experience on top of it is fairly straightforward. It is work–we’ve got to update the user interface and there are some other things we have got to do.

But the basic system is absolutely scalable to a tablet. While we weren’t working on it, that was one of the real attractions that Palm had for HP, that they could rapidly expand into a variety of different devices.

Obviously their long-term interest isn’t just in tablets and phones even?

Rubinstein: They’ve stated they are moving their printers to webOS. We’re busy working with the guys from the printer division to do that. There are other things going on within various parts of HP that are looking at using webOS or building on top of webOS.

The Labs people are doing some really exciting things. They are very excited to have webOS to build on top of.

What are some of the considerations that come in when you are going to build for a printer or a tablet that just weren’t needed when you were just a phone?

Rubinstein: Well, because webOS was a 1.0 operating system, frankly we hadn’t paid enough attention to machine dependencies. We were doing each product in its entirety. We did have to worry about another division using the code or even having more form factors than a handful at any point in time. So, one of the things we are doing right now is getting webOS to be much more machine-independent.

We were clearly very interested in enterprise, but it wasn’t on as fast a track as we are now. We already had a variety of enterprise capabilities. WebOS 2.0 has got VPN and other enterprise-class features. But we’re significantly accelerating our enterprise capabilities so we can utilize HP’s huge sales channel in the enterprise

You talked about webOS scaling. Is there any reason it couldn’t be powering a low-end notebook?

I think a netbook is fine. I don’t really want to get into the notebook business. We’ll leave that to Microsoft. The notebook business is partnering closely with Microsoft. We’re not focused on that at all. Our plan isn’t to subsume what Microsoft [does]. That’s not our goal. There is a very, very strong business on both the notebook and desktop space–and server space–that’s Windows-based and that makes sense.

With the HP acquisition you got a lot more resources, but you lost a lot of the people that built webOS.

Rubinstein: Yes and no. There’s a large group of us that built webOS. Clearly, anytime you go through a transition like this you are going to lose some people along the way. We lost some. We’ve also been hiring a lot. Since we closed the deal we have hired over 70 people. Two hundred-plus people from HP have joined us, and other divisions at HP are busy working on helping us make webOS successful. So while yes, we lost a few people along the way, we gained a lot of people.

You mentioned on stage you have a variety of products coming next year in several shapes and sizes–phones, tablets. How important will next generations be for some of those products?

Rubinstein: We’re big believers that the more bandwidth the better. I am very excited to get to LTE and HSDPA+ [two faster cellular networks]. We have some really interesting visions on where webOS can go as you get more and more bandwidth.

You were there the other night when [Qualcomm CEO] Paul [Jacobs] and I were talking. The two big issues, we think, are battery life and bandwidth.

More and more bandwidth will enable more and more things that today we cannot even imagine. And remember, we designed webOS to integrate tightly with the cloud. My personal view is that
it’s not about applications. Applications actually [will] bifurcate to where part of them runs on the device and part of them runs on the cloud.

Are you spending a lot of time thinking about how to synch the data that lives in a webOS device with all of HP’s other products?

Rubinstein: We certainly think that a unifying experience around webOS and the ability to access your cloud data across a variety of devices is absolutely crucial

A lot of data is going to be on laptops and desktops. Do you need to build a cloud device to have webOS talk to them?

Rubinstein: Stay tuned.

How do you get the developers you need to create webOS apps?

We have a lot of really interesting ways to develop for webOS. It’s very easy to develop for, and people like developing for it. We are getting a whole new generation of developers.

We had this developer conference in New York. If you look at the audience, a lot of them were under 17 and they were making enough money selling applications to come from wherever they were–they weren’t from New York–to bring one of their parents or both of their parents to come to the developer conference.

And to grow your share of the big-time application developers in mobile. Do you think it’s just a scale question, and if you guys can sell more devices you will get them?

Rubinstein: We have doubled our application base since, from sometime around the acquisition close until now

We’ve got, and it depends how you count it, 5,000 to 6,000 applications….If you look at the Android store, a lot of that is crapware. We’ve focused on delivering quality. We are going to add a lot more stuff over time as well, because obviously there’s a lot of competition about the number of apps. But at the end of the day they don’t use 300,000 apps–they use that dozen apps that are important to them. We need to make sure we have that dozen apps for a broad set of customers.

But you are not there today?

Rubinstein: We’re not there today. I would say we are well on our way. Obviously we kind of stalled for a bit going through the acquisition.

Looks like a Wi-Fi-enable version of Apple’s iPhone is indeed headed to China–and sooner rather than later. According to a notice published by the country’s Telecommunication Equipment Certification Center, Chinese regulators have issued a network access license for an iPhone that supports “HSDPA and WAPI security mode with wireless LAN capabilities.” WAPI is China’s homegrown wireless standard.

Interestingly, photos of the approved device published by the TECC suggest it’s an iPhone 3G or 3GS, not the iPhone 4.

Evidently, Apple (AAPL) was willing to customize the device for a single market, something it’s been unwilling to do in the past. But it had very good reasons: Sales of the iPhone in China are widely believed to have been undermined by the device’s initial lack of Wi-Fi support.

With that issue remedied, sales through China Unicom could ramp up–a boon for Apple, which has targeted China as its next major geographic growth opportunity. Recall Apple COO Tim Cook’s words during a recent company earnings call.

China has been interesting. If you look at greater China which we define as mainland China, Hong Kong and Taiwan, the iPhone units were up year-over-year over nine times. We added another 800 points of distribution in China. The revenue, we have never released this number before but I will do this in this particular case, through the first half of the fiscal year that we just completed for the six month period our revenue from greater China was almost $1.3 billion and this is up over 200 percent year-over-year. So we are well pleased with how the company is positioned to take advantage of the growth in greater China.

“Speculation is rife that Apple will end its exclusive U.S. iPhone service deal with AT&T when the current contract expires in June 2010 and begin to offer phones that work with the Verizon network,” iSuppli analyst Francis Sideco said in a research note today. “However, iSuppli doesn’t believe this will be the case. The main reason Apple is likely to stick with AT&T beyond 2010 is the relatively wide usage and growth expected for the HSPA air standard used by the carrier for 3G data.”

As Sideco explains, “Cumulative global subscribers of HSPA wireless services, consisting of High-Speed Downlink Packet Access (HSDPA) and High-Speed Uplink Packet Access (HSUPA), are set to rise to 1.4 billion in 2012, up from 269.1 million in 2009. In contrast, cumulative subscribers for the EVDO standard used by Verizon will amount to 304.6 million in 2013, up from 145.2 million in 2009.”

A point worth noting, though it’s hard to imagine that Apple (AAPL) doesn’t harbor some resentment toward AT&T (T), which has undermined its carefully crafted iPhone experience. And if that’s the case, wouldn’t it make more sense for the company to extend its deal with AT&T, but not as an exclusive? That would allow Apple to hammer out a second deal with Verizon (VZ), which, according to some analysts, would more than double U.S. iPhone sales in the near term.

As Bernstein Research analyst Toni Sacconaghi noted this summer, “Verizon’s postpaid subscriber base is not only larger than AT&T’s, but more importantly, is untapped whereas we estimate more than 10 percent of AT&T’s postpaid users already have an iPhone.”

“Speculation is rife that Apple will end its exclusive U.S. iPhone service deal with AT&T when the current contract expires in June 2010 and begin to offer phones that work with the Verizon network,” iSuppli analyst Francis Sideco said in a research note today. “However, iSuppli doesn’t believe this will be the case. The main reason Apple is likely to stick with AT&T beyond 2010 is the relatively wide usage and growth expected for the HSPA air standard used by the carrier for 3G data.”

As Sideco explains, “Cumulative global subscribers of HSPA wireless services, consisting of High-Speed Downlink Packet Access (HSDPA) and High-Speed Uplink Packet Access (HSUPA), are set to rise to 1.4 billion in 2012, up from 269.1 million in 2009. In contrast, cumulative subscribers for the EVDO standard used by Verizon will amount to 304.6 million in 2013, up from 145.2 million in 2009.”

A point worth noting, though it’s hard to imagine that Apple (AAPL) doesn’t harbor some resentment toward AT&T (T), which has undermined its carefully crafted iPhone experience. And if that’s the case, wouldn’t it make more sense for the company to extend its deal with AT&T, but not as an exclusive? That would allow Apple to hammer out a second deal with Verizon (VZ), which, according to some analysts, would more than double U.S. iPhone sales in the near term.

As Bernstein Research analyst Toni Sacconaghi noted this summer, “Verizon’s postpaid subscriber base is not only larger than AT&T’s, but more importantly, is untapped whereas we estimate more than 10 percent of AT&T’s postpaid users already have an iPhone.”

Digital Cameras

Megapixels: This term describes the highest resolution photo a camera can take. Often mistaken as the most important factor in a digital camera, a high megapixel count — such as 10MP or more — isn’t necessary for the average user unless he or she plans on heavily editing or enlarging photos. Most new digicams offer between five and eight megapixels, which is usually more than enough.

Optical or Digital Zoom: Optical zoom, determined by the physical movement of a lens, matters much more than digital zoom, which digitally alters an image using the camera’s internal computer. Camera companies still try to confuse potential buyers by listing a camera’s total zoom, or the optical and digital zooms multiplied together. Ignore total zoom numbers and instead focus on optical, which now averages around 5x for many new cameras.

Image Stabilization: When generously sized LCD viewing screens started replacing optical viewfinders, they also forced users to hold their cameras at arm’s length, making for plenty of blurry photographs. To remedy this, camera manufacturers have added image stabilization, tools once found only in high-end SLR models. Optical (also called “mechanical”) and digital image stabilization correct for unsteady hands and moving subjects, respectively. Cameras with both types advertise dual image stabilization, which corrects for both situations and costs more.

Mobile Devices

HSDPA and EVDO: HSDPA, or High Speed Downlink Packet Access, is the name for AT&T‘s 3G, or third generation, mobile network that operates at roughly the speed of a slower DSL in a home. HSDPA is available in most major metropolitan areas and is seen as the competitor to Verizon and Sprint’s EVDO (Evolution Data Only) networks, though the popular iPhone runs on AT&T’s network using Wi-Fi and EDGE technology rather than HSDPA.

Multi-Touch Technology: Most popularly found on Apple’s iPhone and iPod touch, multi-touch is starting to show up in other products, such as in Microsoft‘s Surface, a coffee-table-like computer. Rather than just responding to on-screen touches, this technology enables moving, resizing and zooming pictures and Web pages using one or more fingers simultaneously. Look for many more devices — mobile and otherwise — to incorporate multi-touch in the future.

GPS: Global Positioning Systems are most often found in cars — either built-in or on portable devices from companies like Garmin and TomTom. These gadgets use satellite technology to determine geographic location, and high-end models even display Web content like news and weather along with directions. GPS integration in mobile devices can be used to plot routes in cars, can help users find nearby businesses while on the go and can link friends by showing one where the other is located and what they’re doing.

Digital Music

DRM: Digital rights management is a set of standards that protect the intellectual property rights of online content like music and videos, preventing it from being illegally distributed across the Web. In the past year, Vivendi‘s Universal Music Group, Apple and (most recently) Sony BMG said they will start selling DRM-free versions of songs, often for a higher price. In Apple’s iTunes store, these files are called “iTunes Plus” and aren’t restricted like other iTunes content.

MP3: MP3 files are open, without any DRM restrictions. Files that you rip (copy) from your own CDs are usually converted into MP3s, though iTunes users can automatically rip tracks into that program’s special format, called AAC. MP3 files can be uploaded to social-networking sites for sharing with friends and online communities.

These file types are protected by rights that tie them to specific players. Generally, AAC files make up the majority of tracks sold on Apple’s iTunes store and play only on Apple’s iPods; WMA files are Microsoft’s version of proprietary files.

Wi-Fi

The popularity of Wireless Fidelity, or Wi-Fi, brings this technology to more and more portable devices like the iPod Touch and Microsoft Zune and gives companies good reason to incorporate Wi-Fi receivers in new computers — laptops and desktops alike. While available in many flavors, different letters like b, g, a and n stand behind Wi-Fi’s more technical name, 802.11, to help discern one version from another according to characteristics like speed and compatibility. The latest version, “n,” offers the greatest range and speed, and “n” devices are usually compatible with earlier versions.

Televisions

HDTV: High-definition television has now become the standard, capable of displaying vastly better pictures, provided the source is also HD. Today’s more popular flat panel HD televisions are LCDs, or liquid crystal displays, though plasmas still hold their own. Recording HD content can’t be done with a regular digital video recorder; instead, a special HD recorder is required to capture this higher quality content.

480p vs. 1080i vs. 720p vs. 1080p: These numbers refer to the resolution, or sharpness, of a digital display, while “p” stands for progressive and “i” stands for interlaced. A resolution of 480p, known as EDTV or Enhanced Definition TV, is found most often in low-end plasmas or LCD screens. A TV with a resolution of 1080p is currently considered the Holy Grail, and costs the most. But 1080p pictures usually can’t be distinguished from less expensive 1080i or 720p pictures by average viewers at the typical distances from which most folks watch TV.

Blu-ray vs. HD DVD: Blu-ray and HD DVD are incompatible high-definition disc formats that continue to fight a seemingly endless battle to replace the DVD. The Blu-ray camp is led by Sony and the HD DVD camp is led by Toshiba. The two formats aren’t so different, technically speaking, but their very existence is confusing to consumers. The recent decision made by Time Warner‘s Warner Bros. to use Blu-ray gives Sony’s side a boost, and now Viacom‘s Paramount is rumored to be switching to Blu-ray from HD DVD. Dual-format players from Samsung and LG offer some solace.

Email: mossbergsolution@wsj.com

I attended the iPhone launch event, and was able to use one for a little while. That’s too brief an encounter to allow me to write a proper review. But I can say that it has the largest and most beautiful screen I’ve ever seen on a cellphone, even though it’s incredibly thin. It felt great in my hand. It has a brilliant new user interface; the handsomest email program and Web browser I’ve ever seen on a phone; a full-blown iPod music and video player built in; and even a cool new voicemail system.

The iPhone has some potential downsides — it doesn’t use a physical keyboard, instead relying on a virtual keyboard on the screen, which may put off heavy email users. It runs on the relatively slow EDGE cellular data network, though that flaw is partly offset by the fact that it can also use speedy Wi-Fi wireless networking. And, with a $499 base price, it’s expensive.

Still, the iPhone made my relatively new Treo 700p seem primitive in many respects when I compared them side by side. And the Apple product isn’t Palm’s only problem.

Palm’s position as the design leader in smart phones has been under assault for months. Major phone makers like Motorola and Nokia have introduced models that have most of the Treo’s capabilities but are thinner, sleeker and lighter — and much less expensive.

The Treo maker is starting to respond, but haltingly. It has brought out a couple of slightly smaller new models, but they’re no match in sleekness or style for competitors like the Motorola Q. They also aren’t as cheap. They do, though, have some advantages in software and functionality that, for some users, will make them preferable.

I’ve been testing the latest skinny contender, the Samsung BlackJack, along with Palm’s newest Treo, the slimmed-down Treo 750. Both of these phones — like the Apple phone — run on the Cingular Wireless network. Both also use Microsoft‘s Windows Mobile software.

The new Treo 750 is slimmed down a bit from the familiar Treo 700 and 650 models. The 750 is also a little shorter, because it does away with the protruding antenna. In addition, it’s a hair thinner and about 16% lighter.

But next to the new Samsung BlackJack, the Treo 750 looks bulky. The BlackJack is a striking, all-black model in the slim tradition of the Motorola Q. It manages to cram a full keyboard, like the Treo’s, into a body that is much sleeker and better looking. The BlackJack is 35% lighter — and 36% smaller overall — than the Treo 750. It has a physically smaller screen, but that screen has a third better resolution than the Treo’s. (Of course, both screens look tiny and grainy compared with the display on the new Apple phone.)

Also, the BlackJack claims 38% better battery life than the Treo, and it runs on a faster data network than the Treo. (Neither phone includes Wi-Fi.) And, to top it all off, the BlackJack is half the price — $199, compared with $399 for the Treo 750.

One of the Treo’s biggest advantages has been its Palm software, which I consider to be better designed for email and phone calls than the Windows Mobile software from Microsoft. But the new 750 model can’t claim that advantage because, while it has Palm hardware, it uses the Microsoft software.

The Treo does have a small software advantage over the BlackJack. It uses a fuller version of Windows Mobile that has more features than the stripped-down version used on the BlackJack and the Motorola Q. And, because it has a touch screen, the Treo is easier to navigate than the BlackJack, which must be controlled with buttons and a scroll wheel on the side.

Also, the Treo’s control pad felt better to me than the BlackJack’s, which was cramped. I kept hitting other buttons on the BlackJack while trying to scroll or select icons.

In my tests, both the Palm and the Samsung sent and received voice calls well. Both also exhibited the clumsiness that is inherent in Windows Mobile — multiple key presses were needed to do simple tasks. Both have basic cameras with resolutions of 1.3 megapixels. (The Apple iPhone’s camera will be two megapixels.)

The BlackJack runs on Cingular’s new broadband data network, called “3G” or HSDPA, while the Treo 750 uses a slower network called UMTS. Oddly, however, in my tests, the Treo was generally as fast or even faster at retrieving Web pages than the BlackJack.

Of these two phones, I prefer the BlackJack. But if you’re in the market for a smart phone and can afford $499, you might want to wait until June for the Apple iPhone. The Apple entry is so full of promise that anyone buying a smart phone in 2007 should at least wait for the full reviews and a chance to try it out.

Email me at mossberg@wsj.com.

This year, that tower of babble is higher than ever, as new terms have come into being, and old ones have come to the fore. So, here’s a quick glossary of some of the current techno terms you may encounter when shopping for a computer, television, digital camera or cellphone this holiday season.

Aero: This is the graphical user interface that’s a key part of Microsoft’s new Windows Vista operating system, due out around Jan. 30. If you want to get the full benefit of Vista, make sure any Windows PC you buy this season is capable of running Aero. Many are not.

Antiblur: Also known as antishake or image stabilization, this is a crucial feature of digital cameras today. Because few cameras have optical viewfinders, users tend to hold them at arm’s length to frame the shot on the LCD screen. This increases the likelihood of shaking the camera. An anti-blur feature can correct that. The best antiblur technology is optical. Digital versions are less effective.

Draft N: This is a new, faster, longer-range version of the popular Wi-Fi wireless networking system, and many new Wi-Fi products are built to comply with it. It succeeds the common “G” flavor of Wi-Fi. But, there’s a catch. As the name implies, this technology is based on a draft of the forthcoming new Wi-Fi standard, to be called “N.” And the final standard could be different enough to make Draft N gear outdated in 12 to 18 months.

Dual Boot: A computer that is configured to boot, or to start up, in two different operating systems, depending on which the user chooses at any one time. The most important example of this currently is on Apple’s Macintosh computers, which now can be set up to run either the Mac operating system or Microsoft Windows using Apple’s free dual-boot software, called Boot Camp.

Dual Core: A type of microprocessor — the brain that runs a computer — which packs the equivalent of two processors into a single chip. The best known dual-core processors in consumer computers are Intel’s Core 2 Duo and Core Duo, but rival AMD also makes them. They are a good bet for most people.

Flash Player: A small-capacity digital music player, like Apple’s iPod Nano and Shuffle. These players use flash memory, a type of memory chip that behaves like a small hard disk to store music, photos and videos. Larger players, such as the full-size iPod and the new Microsoft Zune, use actual hard disks, like the ones in computers. Flash memory is also what’s inside the small memory cards used in digital cameras.

HDMI: This acronym, for High-Definition Multimedia Interface, describes a new kind of cable for hooking high-definition TVs to things like cable boxes and DVD players. It provides a high-quality digital feed, and combines both audio and video signals via a single connection. When shopping for an HDTV, make sure it has HDMI connectors on the back.

HSDPA: An awkward name for a new high-speed cellphone network being deployed in the U.S. by Cingular Wireless. Its full name is High Speed Downlink Packet Access, and it’s intended to compete with successful high-speed networks from Verizon and Sprint called EVDO, or Evolution Data Only. All of these new networks allow Internet access at about the speed of a slow home DSL line, which is a big boost for cellphones. If you care about email and Internet access on a phone, and you are using Cingular, get a phone that can handle HSDPA.

Quad Band: A cellphone that handles all four bands, or frequencies, used in various countries by wireless phone companies adhering to a world-wide standard called GSM. Examples are Cingular and T-Mobile in the U.S., and Vodafone and Orange in Europe. A quad-band phone can be used on any GSM network anywhere, so if you travel overseas a lot, you may want one.

RAW: A file format for digital photographs that is uncompressed and largely unmodified by the camera’s chips, and therefore includes every detail of the color and image. It is prized by professional photographers and serious amateurs, who look for cameras and photo software that can handle the RAW format. But it produces enormous files, so most users should ignore it and stick with the very good, very common compressed photo format, called JPEG or JPG.

Shared Memory: A computer configuration in which the video circuitry lacks its own dedicated memory and must share, or drain off, a portion of the computer’s main memory. This is common in lower-price computers. It’s fine, but it reduces the amount of memory available to the nonvideo functions of the computer, so you may want to add extra memory to a PC of this type.

WAN: Any wide-area network, such as a cellphone network, that can be used to send and receive data. It is distinguished from a LAN, or local area network, such as the wired and wireless networks deployed inside a business or home. Some computer makers use the term for the built-in cellphone modems in their laptops.

Good luck with your gift shopping. Don’t get trapped in the tower of babble.

Email me at mossberg@wsj.com.

Here are a few questions about computers I’ve received recently from people like you, and my answers. I have edited and restated the questions a bit, for readability. This week my mailbox contained questions about Cingular data networks, the quality of Compaq laptops and options for connecting an iPod to home speakers.

In your review of the new T-Mobile BlackBerry Pearl, you said Cingular Wireless has a data network that is much faster than the EDGE network that T-Mobile uses. But I have a BlackBerry from Cingular and it, too, uses EDGE. So how is Cingular faster?

In 80 cities, Cingular has now rolled out a new network based on a technology called HSDPA that, in my tests, can be 10 times as fast as EDGE. However, most of its phones and digital devices haven’t been updated in new versions that can use the new, faster network. So far, only a few regular phones and laptop data cards from Cingular can use HSDPA. Its data-centric hand-helds, like BlackBerrys and Treos, are still stuck on EDGE, which Cingular continues to maintain alongside the new faster network.

But Cingular plans to offer new versions of the data devices in the coming months that can take advantage of the new, higher speeds. By contrast, T-Mobile has nothing faster than EDGE. Verizon Wireless and Sprint also have networks that are much faster than EDGE, based on a technology called EVDO. They are way ahead of Cingular in both the number of cities deployed and in the variety of devices that can use the highest speeds. For instance, the Verizon Treo I carry uses EVDO and can download Web pages and email attachments much more quickly than any EDGE device can.

There is a catch. With Verizon, Sprint and Cingular, even if your phone or data device can use the highest-speed networks the carriers offer, they will drop down to a lower-speed network if you enter an area where the higher-speed coverage isn’t available.

I bought a Compaq laptop in January 2005. Now in August it will not turn on. Naturally I only had a one-year warranty. The Geek Squad tells me I need a mother board, and that will cost more than a new laptop. Does Compaq have a history of only lasting a little over a year, or did I get a lemon?

Neither my email from readers nor anything I have read suggests that Compaq computers typically last only a year or so. However, reader surveys published by Consumer Reports and PC Magazine rank the Compaq brand (which is now owned by Hewlett-Packard) at or near the bottom in categories like how often its laptops need repairs and how reliable they are.

In general, I believe that as the factories in China (where nearly all laptops are made) jam more powerful and numerous components into slender laptops, quality and reliability are falling. Even Apple, which ranks at or near the top on the surveys I mentioned, is having problems with some of its newest laptops (and I am not referring here to the burning batteries Apple and Dell purchased from Sony).

Are there any good, effective options for getting an Apple iPod to work with a home speaker system? I guess I’m envisioning a “receiver” that allows an iPod to dock with it.

There are lots of products on the market that allow you to connect an iPod to a home audio system, or even just speakers. They range from simple audio cables you can buy at Radio Shack to iPod docks that connect to speakers or an audio receiver, and even wireless approaches. Apple itself makes a $19 cable and a $39 dock for this purpose and also sells a complete kit, with dock, cables and remote, for $99. But other companies sell similar products as well as self-contained docks.

There are way too many of these to list here, but there are some Web sites that can help you. Apple has a Web page listing some accessories, at www.apple.com/ipod/accessories.html. More are listed at Apple’s online store, at store.apple.com, under iPod Accessories — “Cables & Docks.” Another good source for information about this topic is ilounge.com.

* * *

Because of the volume of email I receive, I can’t routinely answer individual questions by email, or consult on individual problems or purchasing decisions. I read all questions I receive and select three each week to answer in the column.

Write to Walter S. Mossberg at mossberg@wsj.com

And the cellular broadband services, such as Verizon Wireless’s BroadbandAccess, can operate at speeds roughly equivalent to, and sometimes well beyond, the speed of basic wired home DSL service. That means you can surf the Web, and get email and large attachments pretty efficiently.

The card for the Verizon network

A small percentage of users hook up to these cellular broadband networks using laptops that have the necessary gear built in. Another small group uses a cellphone as a modem. But most users of these networks use external cellular-modem cards that plug into a standard slot on the side of their laptops. Therein lies a problem.

The computer industry is in the process of dumping that standard slot, called a PC Card slot, for a new, incompatible slot called ExpressCard. So, buyers of many new laptops are finding their cellphone modems are obsolete.

Now, Novatel, a leading maker of these cards, has come out with a couple of new ExpressCard versions for cellular broadband networks. One, which works on Verizon Wireless’s network, is already on the market, sold by Verizon and by Dell. The second, which works on Cingular’s BroadbandConnect high-speed network, will go on sale from Dell and possibly Cingular later this year, likely late November.

I have been testing the Verizon version of the card, called the V640, as well as a pre-release model of the version that works with Cingular, which Novatel calls the Merlin XU870. The tests not only gave me a chance to evaluate the cards themselves, but also to compare the Verizon and Cingular high-speed networks.

My verdict: The cards were easy to set up and use, and worked well. But the two high-speed networks are very different. While Cingular gave me higher speeds than Verizon in a couple of locations, the Verizon Wireless BroadbandAccess network crushed Cingular’s BroadbandConnect in most places I compared them.

This wasn’t a rigorous scientific test. I used two different laptops, an Apple MacBook Pro and a Dell Latitude D820. The Cingular tests were all conducted on the Dell, because the Mac software for the Cingular card won’t be ready until the card goes on sale. The Verizon tests were all conducted on the Mac. On both machines, I used the test service at speakeasy.net, accessed via the Firefox Web browser.

Also, I tested the cards in only Washington and New York City, and on Amtrak’s Acela Express trains in between. That is a heavily populated region; it’s also Verizon’s home territory, and Cingular might have done better in other parts of the country. Verizon has been rolling out its high-speed network since 2003; Cingular is well behind. Verizon offers the service in 185 metro areas; Cingular is in just 75.

Both cellphone carriers charge $60 a month for unlimited data service using the cards, if you have a voice plan with them. The new Verizon card costs $180. The new Cingular-compatible card is likely to cost $50 more.

The cards look nearly identical, and each works on both Windows and Macintosh computers. On Windows, you must connect using special software. On the Mac, you can simply use integrated software from Apple, if you choose. Both cards have small flip-up antennas and indicator lights. Both worked fine.

Verizon’s high-speed service is often called EVDO, for its underlying technology. Cingular’s service uses a technology called HSDPA.

In my tests, which involved about 20 head-to-head comparisons, the Verizon card and network averaged 818 kilobits per second “downstream” (to get Web pages, and to receive email and attachments) and 113 kbps “upstream” (to send email and files).

By contrast, the Cingular-compatible card averaged just 463 kbps downstream and 77 kbps upstream. Plus, during the three-hour train trip, Cingular disconnected me, or simply had no coverage at all, eight times. Verizon did so only once. Verizon has a deal with Amtrak that supplies data service inside the trains, which helped, but this in-train signal doesn’t include the high-speed EVDO service.

Cingular did beat Verizon in two places: my hotel in New York’s financial district and my office in downtown Washington. In the hotel, the Cingular service got a downstream speed of 1753 kbps — its highest in my tests — versus 888 kbps for Verizon and just 747 kbps for the hotel’s expensive wired Internet service. In my office, Cingular got 1133 kbps downstream versus 644 kbps for Verizon.

But the downstream speeds varied wildly. In Trenton, N.J., the Cingular service managed just 16 kbps. The best for Verizon was 1366 kbps in New York’s Penn Station, while its worst was 132 kbps between big cities in New Jersey.

I recommend both new cards. But unless you live, work and travel in very strong Cingular coverage areas, Verizon is the better choice for high-speed wireless data, at least today.

Email me at mossberg@wsj.com.