Here’s a new video that has been making the rounds recently featuring “Roller Babies,” which is essentially a computer-generated bunch of babies on skates doing a rap number.

It’s a commercial for Evian Water, but BoomTown laughs every time I look at it anyway–probably because it reminds me of the most famous of all viral videos on the Internet.

I speak, of course, of the dancing baby from the television show, “Ally McBeal.”

Debuting in 1997, doing a bizarre boogie to “Hooked on a Feeling,” better known as the “Ooga-Chaka” song, the innovative video was an instant hit and is one of the first and best examples of the Web’s powerful virality.

I still heart that creepy little virtual nipper.

Compare and contrast:

Roller Babies

The Dancing Baby

But even though you can use these services without leaving home, many of them still require you to go to a specific Web site — one you wouldn’t necessarily visit regularly. Sites like Gazelle.com and Venjuvo.com that pay cash for old electronics (or just recycle them) aren’t exactly online destinations.

Now one of those ways to unload your stuff involves a Web site you might visit many times a day. A site that has considerable sway in the social-networking world, where over 175 million active users go to share personal stories, photos and videos with hundreds of “friends.”

That’s right, I’m talking about Facebook. Tuesday, the social-networking giant announced its new Facebook Marketplace, Facebook.com/Marketplace, an integrated application powered by Oodle, known for its work with online classified ads. Marketplace uses colorful icons to represent four actions you can take in its app: Sell It; Sell for a Cause; Give it Away; and Ask for It.

Facebook Marketplace users can pick from 12 categories of listings, as well as buy or sell items for a favorite cause.

Oodle granted me early access to the Marketplace app before it became available Tuesday. A friend of mine and I were both set up with test accounts so that we could see one another’s fake Marketplace items and interact with one another within Marketplace; hundreds of Oodle employees also were testing this. (It was fun to see what people offer for sale when they’re just pretending, like one person who offered to sell everything on a colleague’s desk when he was out.)

Facebook’s original iteration of Marketplace started back in 2007, but was geared toward services like housing and jobs. The Oodle-powered Marketplace is merchandise-centric and includes more detailed organization, deeper integration with Facebook, and ways to buy or sell things to raise money for 1.7 million causes.

It still lacks a built-in electronic payment system, such as PayPal or Discover card, for exchanges between users or donations to causes. Instead, Marketplace encourages its users to exchange money however they choose, like traditional classified ads. And that could cause some obvious problems. For instance, if an item were sold for a cause, the seller could later donate the amount via credit card after closing a listing. But there’s no guarantee that the seller will actually do this. Oodle says it will listen to feedback from the Facebook audience and will try to integrate e-payments, if preferred.

Every posted item can include a location, description, category, photo and an explanation of why it’s in the Marketplace. Each item is reviewed by Oodle’s fraud-detection program, which looks for inappropriate content and suspicious activity, and a post could take up to 30 minutes to appear online after you submit it. My posts displayed almost instantly in the Marketplace newsfeed. Users also can opt to publish their posts to their Facebook profiles.

One example of Marketplace’s newly detailed organization comes in its browsing options. The old version of Marketplace had options to browse through jobs and housing, but not specific categories of items for sale. Now, users can browse through 12 categories of specific items including “Home & Garden,” “Baby & Kid Stuff,” “Tickets” and “Musical Instruments.” Items that don’t fit into these 12 categories are put into an “Everything Else” category.

Each item in Marketplace integrates with Facebook’s familiar format, like having its own online “wall” where questions and comments appear. If you’re looking for something in Marketplace by using the “Ask for It” option, you can recruit people to help you find the item by selecting from your list of friends, which works the same way people can suggest Facebook people to friends who might know them. Glancing at an item shows the seller’s profile photo, a link to all of the person’s listings and a brief history of his or her overall Marketplace activity, such as “3 listings in the last month.”

The integration of charitable causes into Marketplace gives supporters new ways to raise money for a favorite group like the World Wildlife Fund or Habitat for Humanity International. On the Marketplace home page, causes are displayed in a right-hand panel with a daily featured cause. This Featured Cause shows who else supports it and how many items you can buy or sell to support it.

Privacy is a natural concern in online marketplaces. By default, your posted listings are visible to any Facebook member in Marketplace. Users can opt to remain anonymous — they’re listed as “Facebook user is selling a bike,” for example. In that case, the only way someone can contact that person is by posting a comment and waiting for the seller to respond.

People who aren’t members of Facebook can see your listings by browsing and searching Marketplace, but they can’t post, comment or contact users. Unlike online marketplaces or services that can be used by anyone, Marketplace requires that users be members of the site to interact with sellers, which can be a downside. Plenty of people who aren’t on Facebook might not want to join the social-networking phenomenon just to offload the old couch gathering dust in the garage.

All user notifications — messages indicated in red at the bottom right of a Facebook page — will reflect friends’ activities in the Marketplace, unless you reset the notifications of the Facebook Marketplace app to not notify you. I suggest doing this, unless you really want to know about all your friends’ activities in Marketplace.

Four color-coded icons represent activities in Marketplace and are useful when reading lists of items at a glance: A green dollar sign represents Sell It and a red heart represents Sell for a Cause, for example. And details about each cause are integrated within Marketplace.

The Oodle-powered Facebook Marketplace is straightforward and well organized, and if you’re a Facebook user, its format will be familiar. If you’re not, and you’re looking for a way to sell or give items away for a charity or otherwise, Marketplace might encourage you to join the giant social network. But its payment program could be made a lot easier with electronic options.

Edited By Walter S. Mossberg

• Email us at mossbergsolution@wsj.com. Find this and other columns and videos online free at the All Things Digital Web site: http://solution.allthingsd.com

The story: Big pharma Johnson & Johnson (JNJ) has rolled out a Web clip (below) in which a snarky, knowing commentator gripes about the social pressure to “wear” babies in slings, carriers, etc–and the Motrin-ready aches that “wearing” a baby can cause. And in the last few days lots of blogger/Twitterers have agreed that:

• The ad is offensive.
• Motrin/JNJ doesn’t “get” social marketing.
• Something should be done! Maybe a boycott.

How many bloggers/Twitterers are actually complaining about this? And are there enough to hurt JNJ, which made an estimated $1 billion in profit from Motrin each year? Mmmmmmaybe.

Tools like Google’s blog search and Twitter’s Summize search will tell you that, yes, some number of people are chattering about this on the Web. And as of 8:07 a.m. Monday, the Motrin.com site was down, whatever that means. But from what I can tell, only a few thousand people have actually seen the ad on Google’s (GOOG) YouTube. I’ve asked video watcher TubeMogul for info on the ad’s audience and will update when I get it.

But even if the outrage is widespread, it’s going to be hard make a connection between online chatter and real-world results. Otherwise Ron Paul would be the 44th President of the United States.

Meanwhile, at the risk of a cyber-stoning, let me say that I don’t think the ad–which seems to be aiming at the same set of people who buy very expensive strollers but feel a bit conflicted about doing so–is an outrage. And neither does the person who does most of the baby-wearing in my house.

I ran it by her in the twilight hours this morning, between feedings, and she shrugged: “It’s true.” Then she went back to sleep.

UPDATE: Twitter Moms unite! JNJ has apologized, and is very, very sorry. Kathy Widmer sends Forbes.com this mea culpa:

I am the Vice President of Marketing for McNeil Consumer Healthcare. I have responsibility for the Motrin Brand, and am responding to concerns about recent advertising on our website. I am, myself, a mom of 3 daughters. We certainly did not mean to offend moms through our advertising. Instead, we had intended to demonstrate genuine sympathy and appreciation for all that parents do for their babies. We believe deeply that moms know best and we sincerely apologize for disappointing you. Please know that we take your feedback seriously and will take swift action with regard to this ad. We are in process of removing it from our website. It will take longer, unfortunately, for it to be removed from magazine print as it is currently on newstands and in distribution.”

Lesson: Carping on Twitter does indeed work. Sometimes.

Thus, everyone at AllThingsD.com extends its warm congratulations to Yang and his wife, Akiko Yamazaki (both pictured here), on the birth of their second daughter, which we found out about from–where else?–sources close to the company.

And, despite the current turmoil at his corporate baby, in the wake of Microsoft’s (MSFT) unsolicited takeover bid, I am guessing Yang must be over the moon with the new arrival.

(Memo to Microsoft CEO Steve Ballmer: Give Yang a break and back off, at least for today, or you’ll have wearing-our-mama-hat BoomTown to answer to. A lovely floral arrangement or muffin basket would be a nice touch too.)