The next in my series of screencasts about ASP.NET "Atlas" capabilities is live. Channel 9 description:
"Building on concepts from his previous screencast, Microsoft Federal Developer Evangelist Marc Schweigert demonstrates more AJAX enabling capabilities of ASP.NET "Atlas." You'll see how to AJAX enable the GridView with a couple easy steps (without changing a line of code). Then, you'll see how to add AJAX capabilities to existing ASP.NET 2.0 controls using control extender."
This screencast is available here.