I joined up to the mesh (Tech Preview) a few weeks ago thanks to Yuri Misnik for the heads-up.
Here is a snapshot of the Vista like interface (on the web) including bread-crumbs and the ability to add your own members to shared or sync'd folders in your mesh. Wow.
Mesh is scarily huge, based on REST has feeds galore, does sync'ing and even will allow applications to be shared
Since going to Remix 08 I have been following and reading the great work from two great dev/designer guys:
Jose aside from being a designer GUN he is an ex-colleague of my good friend Michael Cameron, who like Jose has an impressive Silverlight skills. Great library agTweener!
Recently I have been streaming some content with Silverlight - this nice site shows how to go one step further Creating, Encoding and Delivering Silverlight Streaming Screen Capture Videos