How Microsoft internally uses Team System
A new Microsoft IT-Showcase gives a good inside view about operating and using Team System company wide.
Deploying Visual Studio 2005 Team Foundation Server as
an Enterprise-Wide Service
Published: July 2006 Updated: August 2006
By deploying Microsoft® Visual Studio® 2005 Team Foundation Server as an enterprise-wide service, Microsoft is standardizing methodologies for project management, software development, and software testing. This standardization provides a much more transparent management view into projects and makes complying with statutory reporting requirements much easier....
Find the study here or via direct link.