I'm reading through the Apress book Foundations of Atlas: Rapid Application Development with ASP.NET 2.0 and when I hit chapter three, I started to notice a lot of the source code is broken. I kinda expected this sooner or later, since the author wrote the book against a CTP edition of what was then codenamed "Atlas." I'm using ASP.NET 2.0 AJAX Extensions version 1.0 which is the release version of the same Microsoft Ajax technology.
I found this to be very helpful:
It seems to be a section-by-section duplicate of the same information presented by the FOA author, except with examples that work with the latest version of this technology!