A good friend of mine (David McCarter) is going to be teaching a class on the ASP.NET AJAX control toolkit at UCSD. I am looking forward to this class as I am sure it will be digging deep in to AJAX. For more information check out the course class information.
Let me know if you are going to attend.
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.