Avalon and Aero
There's a couple of great posts on Channel9.
First off a really good Avalon demo, the first one that I've seen demonstrating video feeds as textures. The impressive Amazon front-end app is there as well. Roll on the next CTP.
More importantly is the interview with Jim Allchin. We finally have confirmation that Avalon is at the heart of Aero. This was previously unclear, with comments from Chris Anderson implying that Aero could be something separate altogether. I think we wanted some clear signs that Avalon was a key part of the OS.