Longtime Yahoo tech leader Ash Patel is taking some time off until early 2010.

Yahoo (YHOO) confirmed the break to BoomTown.

In recent days, many inside the company had mistakenly thought the 44-year-old EVP for Product Architecture & Strategy was departing the company for good.

Actually, it’s more of a sabbatical for Patel (pictured here). But it could turn out Patel will not come back from it at all.

For now, Yahoo is saying he will.

“Ash will be taking some well-deserved time off to spend time with his family,” said Yahoo in a statement to me. “He will be returning to Yahoo! in early 2010.”

In his latest of many jobs at Yahoo, where he has been employed since 1996, Patel works with its products organization, run by CTO and EVP of Products Ari Balogh, “to drive the development of a comprehensive product strategy, as well as potential strategic deals, helping to evolve and evaluate its audience product and technology strategy.”

It’s one of many leadership positions Patel has had at Yahoo, as the company has reorganized many times over the years, including as EVP of its Audience Products Division, EVP of Platforms and Infrastructure, SVP of Platform Engineering and chief product officer.

He also played a key role as architect of several major Yahoo products, such as MyYahoo!, Yahoo! Finance, Yahoo! Messenger, Yahoo! Chat and many others.

In fact, Patel ended up in a major exec role in a reorg that former Yahoo CEO and co-founder Jerry Yang did in the summer of 2008.

But the appointment of Patel to head the new Global Products group was greeted with some internal dissent, since many were pushing for faster change and new management at the Silicon Valley icon.

Yang was said to have insisted that Patel remain on as planned. He reported directly to President Sue Decker.

Patel stayed on after new CEO Carol Bartz got the top job in January, which was the subject of much interest among longtime Yahoo staff, since he has been one of the few true Yahoo veterans left in a high-ranking role.

In another reorg in late February, this time by Bartz, Patel got his latest title and was placed under Balogh.

Here is a video interview I did with Patel last December about the launch of some open and social networking initiatives at Yahoo (SVP Tapan Bhat, who had once reported to Patel, is also in the video):

Although it’s not news that Yahoo has been readying a new version of its homepage and has spent a lot of time doing so–in fact, it’s gone all Handy Manny with a whole lot of test renovations–the Internet giant begins the massive rollout of it tomorrow.

The official launch of what was code-named “Metro,” which Yahoo had previously said was coming in the fall, will take place on an opt-in “beta” basis for the hundreds of millions of users in the U.S. and will be extended to France, the U.K. and India later this week.

When users log in, they will get a choice–for now, there will be no forcing it–to switch over to the new version, which Yahoo’s Tapan Bhat, SVP of Integrated Consumer Experiences, said in an interview with me today by phone, is the “the most fundamental change to the homepage ever.”

And, indeed, the new look is much different, even than previous launch candidates, featuring an almost complete rejiggering of the look and feel of the most important page at Yahoo (YHOO) and one of the most trafficked on the Internet.

The change is an important one for Yahoo, since its front page is perhaps its most powerful calling card to users and advertisers, as well as to Wall Street. Its homepage gets 330 million unique visitors every month.

Yahoo has redone its homepage many times since its founding in the mid-1990s (you can see the various incarnations of it here), but this new design is perhaps the most dramatic.

(See screenshots of the new regular page and one with a Facebook app featured below; click on the images to make them larger.)

The most striking change is a prominent left-side “My Favorites” area, with 65 specially designed applications that users can customize, including giving a quick hovering glimpse of email, stocks and of third-party sites like Facebook.

Not quite a dashboard or exactly a social networking page, it feels a little as if Yahoo took a browser tab or a toolbar, put it in a vertical format and gave it some great functionality.

Full disclosure: All Things Digital, as well as several other Dow Jones news properties, are in its special alphabetical apps gallery, although I had no idea it would be there.

Yahoo also allows users to create such widgets on the fly from most any Web site and they can have up to 36 apps on the homepage.

There is advertising in the boxes that pop up when hovering over these apps, which is a way of dealing with the issue of purposely sending users away from Yahoo rather than keeping them there. It is a much better version of that trap.

“We want to be the center of people’s lives online and want to do it in an open, innovative way, all while providing a compelling experience,” said Bhat. “It marks the beginning of a renaissance of Yahoo, a renaissance where every pixel matters.”

After looking over the history of Yahoo’s homepages since 1994 (see them all here), it has pretty much told a story of a site with increasingly smaller font sizes and more stuff packed on it.

“It had nothing to do with the user, but what Yahoo wanted the user to do,” said Bhat, rather frankly.

Thus, he said, everything going forward will focus on what the user wants, which, he explained, essentially boils down to a “my world” and “the world” outlook.

In the my-world bucket: Email, favorite Web sites, stock info. In the the-world: General news, search, what’s hot.

But, unlike its highly customized MyYahoo product, Bhat said that Yahoo wanted to make it easier for users to create a page where “there is destination for everything you are about in just a click or two.”

The programmed “Today” module remains, although users can indicate which kind of information–finance, news, entertainment–gets top billing.

The module is also localized, depending on the user.

“We wanted to provide broadcast and narrowcast in one place,” said Bhat.

That includes updating status, right from the homepage, including integration with social networks such as Facebook and MySpace.

But–in a very big mistake–there is no ability to update status to the popular microblogging service Twitter on this part of the homepage, as yet. You can make it an app, though, as Twitter can appear in your Yahoo updates.

And there is a big advertising module still on the right, along with a what’s-hot section. And, finally, there will also soon be complete two-way syncing with mobile devices, said Bhat.

Interestingly, although CEO Carol Bartz has often said internally that she does not like the color purple, which has been the company’s signature one since its founding, the main page keeps up the violet tradition with a lighter tone.

“Yahoo’s color is purple and it is known for that,” said Bhat (deftly not taking my delicious bait).

As to why it has taken so long to get its front page redone–it was originally set to debut late last year–Bhat noted that such a major shift of such a trafficked page was, well, complex.

“It involves bringing users along and also rewiring everything within Yahoo,” said Bhat, who gave Bartz credit for turbocharging the effort, since she first arrived at the troubled Silicon Valley icon in January and quickly put the brakes on the planned launch. “Now, we are looking at Yahoo holistically, all centered around the user.”

Time will tell if it is a success, but it is certainly a good and even innovative effort, in much the same spirit Microsoft (MSFT) has had with its new Bing search offering.

And while some might complain that it is not cutting-edge enough, it seems just the right amount of rejiggering and open feel for the mass of users it serves.

For Yahoo, at least when it comes to this one, change is indeed good.

There’s no question Yahoo owes longtime veteran exec Ash Patel a lot, as it has grown into a global Internet behemoth.

Since getting to the company in 1996–which essentially means he was present at the creation–Patel (pictured here) has, as the corporate page on its top execs notes, played “key roles across the company including architecting MyYahoo!, Yahoo! Finance, Yahoo! Messenger, Yahoo! identity and the user database, and many other products that continue to impact millions of Yahoo! users.”

Now as EVP of the Audience Product Division, he presides over pretty much all of Yahoo’s well-known consumer products, from its homepage to its email to its search to, more recently, the product development of its media offerings.

But, because of his longevity, vast purview and clear impact on the company, Patel has also become a symbol for many inside Yahoo (YHOO) right now, who mention him most often in the should-he-stay-or-should-he-go-now debates about the future of the company and who should be in charge of that.

Thus, Patel’s fate is seen as a key indicator of what is to come at the company, especially whether he and it can change with the very fast-changing times. While his love and loyalty to Yahoo are unquestioned, like many at Yahoo, can he be a true agent of change who could upend all he has built?

The big question, of course: Can old Yahoos learn new tricks?

That, of course, is all now up to new CEO Carol Bartz, who is busy restructuring the company to her liking, in decisions that are about to come down after only six weeks into her tenure.

Bartz is clearly casting herself as the agent of dramatic change and speed, as she noted that in a recent memo to staff:

What does this have to do with the need for speed? Many of the things I just talked about could have and should have been decided earlier but we haven’t been an organization that has embraced the need for speedy decisions, even when they are the tough ones. We can all be part of changing this and getting back to an organization that is fast on its feet.”

With the reorganization in flux, even as big departures occur (mobile head Marco Boerries today, for example), it could start to feel like the rapture at Yahoo, as the old ways make way for, well, the unknown.

Right now, it seems Patel might stay, reporting to CTO Ari Balogh, who is about to also get control over all of Yahoo’s products. Previously, Patel reported directly to outgoing President Sue Decker.

But others are convinced he will go, if not right away in the current upheaval, then soon enough, with Bartz and Balogh on the hunt for a crackerjack new outside product exec to take over and, more importantly, take a fresh look Yahoo’s many offerings.

That’s been Patel’s job for a long time, after a long rise to the top from when he arrived from Oracle (ORCL). He’s been SVP of platform engineering, chief product officer and EVP of the Platforms and Infrastructure Division, before getting his most recent title in one of Yahoo’s umpteenth reorgs.

“Ash is the symbol of old Yahoo, and now he is really actually one of the only ones with longevity in top management,” said one person at the company. “What happens to him–whether he stays and transforms or simply goes–says a lot about the future of Yahoo.”

Here is a video interview I did with Patel recently about the launch of some open and social-networking initiatives at Yahoo (Front Doors head Tapan Bhat, who reports to Patel, is also in the video):

The company was founded by former journalist Tariq Krim in 2005, who ran it with longtime European entrepreneur Pierre Chappaz until he left this past summer to work on another company called Wikio.

Netvibes is funded by the European VCs of Accel Partners and Index Ventures , as well as a smattering of U.S Web players like Marc Andreessen and others, to the tune of about $16 million.

Using a customizable ecosystem that allows a user to include any Web app–such as widgets, feeds, email, videos, blogs and now social-networking apps too–its goal of creating the personalized home page puts it in competition with other sites like Pageflakes, iGoogle and, of course, MyYahoo.

The site has upward of 12,000 feeds of all kinds and about 10 million registered users, aiming to make money via revenue sharing on the various apps used.

The business plan and the whole space, of course, is still developing, as a variety of players compete to become your first stop on the Internet with hopes of finding new ways to monetize that experience.

But here’s Netvibes CEO Krim discussing the whole thing: