I just got done reading this book and I thought I would let you guys know that it does a really great job of introducing you to all of the new ASP.NET 2.0 features. It doesn't go into a lot of detail, but it does a great job of letting you know what's coming and how it will work. I would highly recommend this book.
Also, I'm sure everyone knows about this already, but, just in case you don't, you need to go here immediately and start watching all of the PDC sessions online right now. It is truely amazing that Microsoft put all of these sessions online for free.