The Wall Street Journal reported earlier tonight that Microsoft–in what would be its most aggressive acquisition in the digital space–was zeroing in on buying Skype for $8.5 billion all in with an assumption of the Luxembourg-based company’s debt.

Sources told BoomTown tonight that the deal for the online telephony and video communications giant is actually done and will be announced early tomorrow morning.

The purchase–which has been spearheaded in closely held negotiations by Microsoft CEO Steve Ballmer, with an assist from Business Division CFO Amy Hood and top dealmaker Charles Songhurst–is a bold move for the software giant and its biggest acquisition in more than three decades.

The big price will give Microsoft–which has struggled in its online efforts and has lost billions of dollars for its work–a big brand name on the Web.

With Skype, which has been aggressively expanding, Microsoft will continue to lose money in its Internet efforts. Skype lost $7 million on revenue of $860 million. Operating profits, which Skype preferred to highlight, were $264 million.

And–let us not forget–Skype’s debt is $686 million. Silver lining: That’s slightly less than Microsoft’s Online Services division losses in its most recent quarter!

But, sources said, the concept is bigger than just money, including getting access to Skype’s 663 million registered users.

Skype, which had been headed bumpily toward an IPO until now, will apparently be integrated into Microsoft’s Windows Live and other online communications efforts in both the consumer and enterprise arenas, sources said.

Think Kinect connecting.

Skype has had a big-company owner before–eBay Inc. paid $2.6 billion in cash and stock for it in 2005, as a way for the auction site’s buyers and sellers to communicate.

A 70 percent stake in Skype was sold in 2009 to investors such as Silver Lake Partners, Andreessen Horowitz, and the Canada Pension Plan Investment Board. It then valued Skype at $2.75 billion.

So, obviously, the deal is a big win for them. In addition, at the time they made their investments, Skype was a huge legal mess with lawsuits flying.

Skype has since gotten cleaned up enough to attract Microsoft.

Other suitors have looked at Skype, including Google, although acquisition interest by Facebook was very much overblown, said several sources.

Interestingly, Microsoft’s new smartphone partner Nokia also held meetings with Skype’s CEO Tony Bates, a former Cisco exec who arrived at the company last fall.

Interest in Skype by Microsoft was first reported by GigaOm’s Om Malik on Sunday.

Tune in at 5 am PT for the official press release, apparently, and lots and lots and lots of analysis of whether Microsoft paid too much for Skype.

In an interesting social enterprise move, popular social networking collaboration tool Seesmic is taking a $4 million investment from Salesforce.com, as well as from Softbank.

The San Francisco-based Seesmic has one of the top desktop and also mobile applications for monitoring a consumer’s various feeds from Twitter, Facebook and more.

So far, Seesmic has received $16 million in total funding. Other investors include Atomico, Omidyar Network and Wellington Partners.

Moving beyond a consumer app, where it has one million registered users, Seesmic has also worked closely with Salesforce.com on integrating its Chatter social enterprise network offering.

Deeper integration with Chatter and bridging more social communications with its customers is coming, said Seemsic founder and CEO Loïc Le Meur.

“It becomes an amazing internal dashboard if you are a manager,” said Le Meur in an interview with BoomTown this morning. “It has everything we have built for consumers, but internally.”

There are many such apps and software-based services being developed to inject social into the enterprise, including Yammer, Socialcast and Jive.

It will also be interesting to see if the investment is a prelude to an acquisition by Salesforce.com, to further bolster its own efforts in socializing the workplace.

Here is the official press release:

Seesmic Receives $4 Million Investment

SAN FRANCISCO–Feb 1, 2011–Seesmic, the leading maker of applications that monitor social networks across mobile devices, today announced a $4 million investment from salesforce.com, inc. and a Softbank Group company managed by Softbank Holdings Inc.

Seesmic helps companies monitor, engage and build their brands across social networks and mobile devices. The Seesmic Desktop provides a single console that lets companies view and respond, in real time, to comments being made about their brands in Twitter, Facebook and other social networks. Seesmic Desktop works with Apple’s iPhone and Macintosh computers, smartphones running Google’s Android or [Microsoft] Windows Phone 7 mobile operating systems, Research in Motion’s BlackBerry and on personal computers.

Salesforce.com, the enterprise cloud computing (http://www.salesforce.com/cloudcomputing/) company, and Softbank group join previous investors Atomico, Omidyar Network and Wellington Partners. Seesmic has received a total of $16 million, including the most-recent investment round.

Seesmic and Salesforce.com have worked closely for more than six months to create a seamless integration between Seesmic Desktop and Salesforce Chatter, the industry’s first enterprise social collaboration app and platform. Leveraging the social features popularized by Facebook and Twitter–such as profiles, status updates and real-time feeds–Chatter lets employees “follow” documents, people, business processes and application data. The result is a new level of productivity that crosses departments and organizational barriers. By integrating with Chatter, Seesmic Desktop will enable salesforce.com users to immediately see comments that customers have posted on Facebook and Twitter.

“Salesforce.com has become a valued partner as we work together to bridge external and enterprise social communication with Chatter. These investments will enable us to reach more enterprise customers” said Loïc Le Meur, CEO, Seesmic.

TripIt is one of an emerging group of services that help users format travel information for easy mobile consumption. That might sound simple, but it can be incredibly useful. A user emails any travel itinerary from 1,000 different airlines and other travel sites to plans@tripit.com from a registered email account, and it can be saved to a mobile app and sent to a calendar. Once downloaded to a specific device, it can be accessed offline. If you’ve ever heard of Instapaper, it’s kind of like that for travel planning.

In a phone interview, TripIt CEO Gregg Brockway said that as TripIt moved into small-business services from the consumer market, and the publicly traded Concur began offering products for small- and medium-size businesses in addition to enterprise companies, the two realized they had a common opportunity around “unmanaged travel.” By some estimates, unmanaged travel–where employees book their own trips and expense them, rather than using a company travel agent and preferred providers–is half the business travel market.

TripIt, which says it has “millions” of consumer users and 15,000-20,000 corporate customers, offers many of its tools for free, with premium services like flight-tracking alerts available for $49 per year and a business-oriented offering starting at $399 per year. The company will stay intact in its San Francisco office following the acquisition, which is expected to close next quarter.

Brockway said users of the consumer TripIt product can rest assured it will continue to be free and available.

TripIt had raised $13.1 million from investors such as Azure Capital Partners and O’Reilly AlphaTech Ventures.

Twitter has completed its latest round of funding–$200 million at a $3.7 billion valuation–with Kleiner Perkins as the lead investor, according to sources familiar with the situation.

Sources said the San Francisco microblogging service is also adding two new board members: Flipboard’s Mike McCue and David Rosenblatt, who ran DoubleClick until a bit after it sold to Google.

Twitter recently added former Netscape exec Peter Currie to the board, as BoomTown previously reported.

A Twitter spokesman confirmed the funding and the board appointments, but declined further comment.

The moves are big ones for Twitter, which is moving fast to upgrade its management and business model under CEO Dick Costolo, who just posted a blog (see below) on the new funding and directors, titled “Meaningful Growth (although it was first curiously called, “Stocking Stuffers,” and was much funnier).

But, indeed, a big slug of cash will surely help the start-up’s expansion efforts and essentially declares it is not for sale to bigger companies such as Google (quite yet, that is).

As I reported last week, Kleiner partner John Doerr has been pushing hard to fund Twitter, beating out Russia’s DST Global.

Kleiner is the only new investor in the latest round, which brings its funding total to $360 million since it was founded about five years ago.

The storied Silicon Valley venture firm, which has been aggressively moving into the Web 2.0 space of late, put in $150 million, with the remaining $50 million coming from existing investors.

Past investors include Benchmark Capital, Union Square Ventures, Spark Capital and several other venture firms and angel investors.

Adding Currie, McCue and Rosenblatt are very strong choices for the board. Currie has deep financial and IPO experience, McCue is a well-connected and innovative entrepreneur and Rosenblatt brings much-needed online advertising heft.

As it happens, Costolo will appear at our D@CES event in January, where I am interviewing him and we can talk about all the changes.

(Thank goodness the funding is done, since I was worried about all those awkward pauses.)

Here is new version of Costolo’s blog post on McCue and Rosenblatt (the old one is below it for you to compare and contrast):

Meaningful Growth

In the past 12 months, Twitter users sent an astonishing 25 billion Tweets and we added more than 100 million new registered accounts. In that time, our team has grown from 130 people to more than 350 today. We’re thankful for every Tweet, every account, and every talented employee who has decided to join the Twitter team. This week, we’ve got some big news to share.

As part of a significant new round of funding with investor Kleiner Perkins Caufield Byers and existing investors, we’ve added two new members to Twitter’s board of directors. Please join us in welcoming Mike McCue and David Rosenblatt. The experience these new directors bring to Twitter, along with this renewed investment, will help us continue to grow as a company and business.

2010 was one of the most meaningful years since Twitter, Inc. was founded in 2007. We operate on a principle that people are basically good–when you give them a simple way to express this trait, they prove it to you every day. We’re proud of what Twitter users have accomplished, we’re proud of our work, and we’re very proud of our team. Thanks for being a part of this work; it means a lot to us.

Stocking Stuffer

Growth is fun. In the past 12 months, Twitter users sent an astonishing 25 billion Tweets and we added more than 100 million new registered accounts. In that time, our team has grown from 130 people to more than 350 today.

This week, we added two new members to Twitter’s board of directors who have strong experience running technology companies: Mike McCue and David Rosenblatt. Mike was the CEO of Tellme Networks, is currently CEO at Flipboard and also worked for Netscape and Microsoft (which acquired Tellme in 2007). David is the former CEO of DoubleClick and an ex-Google executive.

We also closed a significant new round of funding, with new investor Kleiner Perkins Caulfield Byers leading the round. KPCB brings to Twitter a track record of helping build great companies, ranging from Amazon to Zynga (get it? A to Z? See how we did that?), and a team with expertise in Internet, mobile and social platforms. The additional resources and expertise will be extremely helpful as Twitter continues to grow as a company and business.

Thank you to Twitter users everywhere for making 2010 such a good year.

Seems Apple is closely following the timeline Jobs laid out for the store last month. Hopefully that means we’ll see the store itself go live “within 90 days,” just as Jobs promised.

You didn’t think Facebook would integrate with Google (GOOG) Voice, did you?

Actually, according to sources close to the situation, Facebook and Skype are poised to announce a significant and wide-ranging partnership that will include integration of SMS, voice chat and Facebook Connect.

The move by the pair–which have tested small contact importer integrations before–is a natural one for the social networking giant, which is aiming to be the central communications and messaging platform for its users, across a range of media.

Facebook’s goal, according to sources: To mesh communications and community more tightly together and add more tools to allow users to do so.

Since it was not going to create an Internet telephony service of its own–kind of like not creating a mobile operating system–Facebook has apparently turned to the Web’s Internet telephony leader.

Interestingly, Facebook has previously tested a video chat product.

Skype had 124 million people using it at least once a month and 560 million registered users, which will be bolstered by the 500 million Facebook users who will now be able to use it more seamlessly within Skype.

That will include allowing users to SMS and call Facebook friends from Skype, which will now deploy Facebook Connect.

And also do video chat using Facebook in Skype, which you can see below, in a very odd screenshot sent to me by a source–Walt Mossberg’s code name is not Daniel Matthews and I am not Allison Brown. (Click on the image to make it larger.)

This all will be available in Skype’s newest version, 5.0, which emerges from beta in a few weeks.

This is a big win for the Luxembourg-based Skype, which is currently readying a public offering.

While it now dominates the online calling space, it needs to be present where users are now moving, such as Facebook.

And for Facebook, this is also helpful to its international push, making it more appealing globally since Skype is much more popular outside the U.S.

It will be interesting to see if both cross-integrate into their popular mobile apps too.

Facebook has been doing a lot of integrations with other communications services, such as a massive upcoming one with Yahoo (YHOO) and also one with Microsoft (MSFT).

Skype is also increasing its partnerships. Today, for example, it will announce a deal with Avaya, which makes office phones and related software aimed at businesses.

The pair called it a “strategic unified communications and collaboration partnership,” and is centered on business and personal videoconferencing.

Earlier this week, I headed down to Mountain View, Calif., to the downtown HQ of Polyvore–the unusually named start-up aimed at the inner stylist in everyone–to talk about the economics of fashion online.

The odd name is a combination that roughly means the devouring of many or much–which at Polyvore translates into leopard prints, kitten heels or the rubber clothes of Lady Gaga.

The registered site, with six million unique monthly visitors, allows users to “mix & match products from your favorite stores” into fashion “sets” on any topic, concept or–in BoomTown’s taste-challenged case–fleece and Pumas.

You can use any soft-goods image from any Web site to do this, also adding music or other visual elements. Polyvore has already branched out into interior design and other arenas.

In February, to up the ante, the innovative fashion and shopping social network hired Sukhinder Singh Cassidy, former president of Asia-Pacific and Latin American operations for Google (GOOG).

At the time, Singh Cassidy said she was attracted to the viral, technological and global nature of the site, which was co-founded in 2007 by Pasha Sadri, the creator of Yahoo (YHOO) Pipes.

Polyvore has garnered $8.1 million in funding from Benchmark Capital, Harrison Metal and Matrix Partners.

Whether it can turn into a big money-making business–it currently has a mixed revenue plan of advertising and sponsorship and also sales lead generation–will be interesting to see.

But it is clear from the 20 million sets created so far, there is a passion to fashion that is easily tapped online.

Here’s the video of an interview I had with Singh Cassidy, Sadri and product head Jess Lee, another former Googler, along with a short tour of Polyvore’s HQ: