The Windows Phone 7 developer launch is rapidly closing in! My list of app and game ideas grows daily, and I am starting my XNA training to be the game programmer I have fantasized being since i was in the 5th grade. I have found a gem of a book Learn XNA 3.0 by Aaron Reed which is a fun read as well as informative. Only drawback is that all of the XNA code is written in 3.0 and XNA 4.0 has been radically altered to optimize the code across the 4 platforms (Windows, Xbox Live, Zune, Windows Phone 7). The good/bad news is that he is writing a follow up book for XNA 4, but it’s not coming out till sometime this or next month.
Learn XNA 3.0 on Amazon:
http://www.amazon.com/Learning-XNA-3-0-Game-Development/dp/0596521952/ref=sr_1_3?s=books&ie=UTF8&qid=1286471905&sr=1-3