For those that haven't "taken the plunge" yet with AJAX, here's a video in which my friend Scott Cate shows you what it can do, and the Javascript and C# code in his cool website to put it all together:

http://channel9.msdn.com/Showpost.aspx?postid=121812

What a great way to get near-WinForms functionality out of a web app!

-Lorin