Oh yeah, are you a game artist and you want to see your art in an upcoming book? Then you should contact me and we should chat!
I've enjoyed your first book, and will enjoy to see my Artwork in your upcoming book. Check my site (about me - project for BH Telecom, works and news) and if you like my work contact me. I would be delighted to help about XNA book.
I doubt I could provide you with any decent art, but I was wondering... Will it be more of a reference book again like Kickstart or a cookbook like Beginning? I could use a reference book for XNA4 to catch up on new features.