The Win8 Product Teams have started blogging about new features in the upcoming Windows 8 release.
Windows 8 Server:Microsoft Server and Cloud Platform Bloghttp://blogs.technet.com/b/server-cloud/archive/tags/windows+server+8/
Windows 8 Client:Building Windows 8http://blogs.msdn.com/b/b8/
Not so much out there for public details on the new Windows 8 Active Directory features so far unfortunately.Best bet for the impatient AD admin is to download the developer preview version of Windows 8 Server and whip up a new forest in a test lab.
For further details check out the excellent compilation of other Windows 8 links on http://blogs.technet.com/b/askds/archive/2011/09/17/windows-8-for-the-it-pro-the-new-plumbing.aspx
Good entry Ingolfur, lots of excitement about Windows 8. I also outlined a few of the new AD features
Mark Minasi had a good overview also www.minasi.com/.../nws1109.htm