It looks like AutomatedQA is doing some great integration work with Team System, adding to what ships in the box:

http://www.automatedqa.com/products/team_system_support.asp

"AutomatedQA is commited to offer tight integration with the Microsoft Visual Studio 2005 Team System services and subsystems. This work is in progress, and we intend to update this page as our integrations develop. The integration of AutomatedQA tools allows you to..."