There is a couple of articles available that discusses the XNA Development Environment:
http://bink.nu/Article6501.bink
http://www.microsoft.com/XNA/3.20.2006.aspx
http://bink.nu/Article6501.bink
http://www.microsoft.com/XNA/3.20.2006.aspx
Developers need a better way to make games and manage the production process," said Chris Satchell, general manager of the Game Developer Group at Microsoft. "XNA Studio enables all developers - from major development studios to the two guys moonlighting on a dream project in their garage or dorm room - to create games in new, more efficient ways.