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Atlassian has raised $60 million from Accel Partners, the venture capital company that has funded such companies as Facebook, Dropbox and Etsy.

The funding is one of the most sizable investments we have seen by any measure in the social enterprise community.

It's validating that a company focused on social product development tools can receive such a large amount of funding, and it shows the demand in the enterprise for tools that include a collaborative, social component.

Most of us have profiles on a wide variety of services these days. Thankfully, most of these profiles are available in machine-readable microformats like hCard or XFN (XHTML Friends Network). For developers, Google's Social Graph API makes discovering these profiles easier, though this is still a relatively complicated process. Now, however, Ident Engine, a new open-source JavaScript library that finds and aggregates user profiles and related activity streams, makes this process a lot easier.

Google just rolled out 18 social gadgets for its iGoogle start page. These social gadgets turn iGoogle into a far more interactive and social experience, as users can now play casual games with other iGoogle users and share videos and to-do lists right from the iGoogle homepage. As Google's Marissa Mayer and Rose Yao, iGoogle's product manager, told us yesterday, while the first incarnation of iGoogle was about connecting people with information, the service will now also focus on connecting people to each other.

When the Google-led OpenSocial campaign launched in October 2007 it aimed to give developers a common environment that application publishers could publish widgets to with one set of code, deployable across Google sites, MySpace, Hi5 and numerous other social networks.

A directory of OpenSocial Apps launched today and the reality is even further from that goal than we expected. Out of 12,456 apps listed, only 83 are running on two or more "containers." That's 0.7% or one out of every 1500. Update: See this reply below from Google's Kevin Marks. Marks says that cross-network presence was counted manually and is actually larger than it appears in the directory.

Sprout, developer of a unique drag-and-drop widget creation service, announced today that its development platform now supports the Facebook Platform, Facebook Connect, and OpenSocial. According to the press release, this will "enable brands and agencies to focus their time on the creative campaign development and still reap the rewards that social networking applications offer.." Which means, if you are using Sprout for your ad campaigns already, you now instantly have access to three more social platforms to deploy on. If you aren't using Sprout, why not?

MySpace just announced that it will bring its Open Platform to Windows Mobile phones. The new MySpace mobile application for Windows Mobile will be built on top of Microsoft's Silverlight platform. In addition, MySpace also announced its MySpace Silverlight SDK, which will make it easier for developers to build OpenSocial applications using Silverlight.

MySpace also announced that LG will preload the MySpace Mobile application on the next-generation of its Windows Mobile 6.1 phones.

A couple of weeks ago we celebrated the first birthday of Google's OpenSocial project, an open API framework for social networks and websites. Google's OpenSocial Blog recently presented some statistics, including that OpenSocial now reaches nearly 675 M registered users and there are 7,500 applications.

What's interesting about these numbers is that the single largest number of registered users isn't coming from MySpace, hi5 or even Orkut. The largest user base appears to be from 51.com, which as we've reported before is one of China's largest social networks with 130M registered users.