The Panel is the place to collect showcases of the new user experiences [in Vista and WPF] and provide insights on how they were implemented.

http://www.microsoft.com/emea/msdn/thepanel/

Definitely check out UniveRSS, a 3D Vista RSS reader.  I can’t really see myself using this but it’s neat to see.  (And it did run like crap on my tablet because the NVIDIA WDDM drivers aren’t final and things crash when I try the pre-release.  Of course the XP driver causes problems too – could be a hardware issue I suppose.  Or just crappy drivers.  Who knows.)

UniveRSS: http://www.microsoft.com/emea/msdn/thepanel/featured/universs.aspx 

(CBC Radio 3 is in the screenshot – woohoo).