There are recent posts about Media Center, RSS, video production, photo gallery, and other niceties.
Microsoft's social networking site is "spaces.live.com". It claims a very large user base primarily because MS owns hotmail (all hotmail accounts are valid). MS Word 2007 has the ability to publish directly to a 'blog (spaces,sharepoint,blogger,etc).
Vista's photo gallery (new release due soon) looks very nice and should help in the battle against Flickr and Snapfish.
In a new world of social networking tools, it is ironic that MS could've taken on the role of sleeping giant. Ironically, "spaces" has better support for RSS than myspace or facebook, and it will use Atom for publishing. They've pledged support for OpenID. They're becoming "open." Weird.