While the Test Centre has been around for a little bit; according to the traffic nobody knows about it-g.

The Microsoft Tester Center showcases the test discipline as an integral part of the application lifecycle, describes test roles and responsibilities, and promotes the test investments required to deliver high-quality software.

http://msdn2.microsoft.com/en-us/testing/default.aspx

I also recommend checking out the book bytes section:

http://msdn2.microsoft.com/en-us/testing/bb417057.aspx