I love Channel9; it's a great resource. I really like the interview videos, even if I just put them on the background to listen to while I work :). Here are some good Channel9 videos I've watched lately (they're not necessarily new, I just hadn't had the time to watch them before):
- Chatting about LINQ and Entities, with Anders Hejlsberg and Sam Drucker. It's always nice to see Anders talk, he's very clear and provides pretty good insights into his designs.
- InfoCard - Deep Architecture. Nice introduction to what infocard does and how it does it. The question on managed versus unmanaged at the end cracked me up.
- There's something about XAML, with Rob Relyea. Pretty good introduction to XAML (I already knew some of this stuff, but it's always nice to see it all put in perspective).