Thanks to everyone who attended. You can download the deck and demo code (with more samples that what I showed) here. Sorry for the technical difficulties with desktop sharing for the last demo. Here's a link to a channel 9 screencast I did that is pretty close to the demo. You can get to all of my screencasts (quite a few ASP.NET AJAX ones) by clicking here.
Here are links to my previously recorded MSDN webcasts:
Building AJAX-Enabled Applications with ASP.NET Code Name "Atlas" (Level 200)
Client-Centric Programming Using the “Atlas” Client Script Library (Level 300)