Offer good while supplies last, so don't dawdle.  This is a great resource that explains the design philosophy behind VSTS.   

http://www.microsoft.com/click/usapo/usdev/meet-milestones/default.mspx

The link to the book offer is at the end of the second paragraph.  This is a must read book.  Take advantage of this offer!

Jeff Ogorek - Federal Developer Solution Specialist