A First Look at ASP.NET v2.0
You can download some sample chapters here.
Just finished reading A First Look at ASP.NET v2.0. Overall I thought the book was well presented and quite concise. I guess this is what I was expecting from a book about software that has not even gotten out of Beta yet! Do not expect this book to go into great detail about anything because it does not. What it will do, is give you a synopsis of the new features coming to ASP.NET v2.0. If you have a liberal book budget and want a good resource written by quality authors then this book is one that I certainly recommend.