If the price of this book was $55 I would pay for it, but it is a free download from Microsoft Press and it is worth far more.
For the book go to:
(Link verified Nov. 4, 2010)
and download the book as well as the source code, unbelievable. Really!
The following image has nothing to do with the Windows Phone 7 nor with SharePoint nor XNA…
End of Secret Communications X010Y