Enterprise Case Study of TFS
Michael Ruminer linked to a great article / document by Microsoft in his blog.
Bravo to Brian Harry and the team that put together the whitepaper Deploying Visual Studio 2005 Team Foundation Server as an Enterprise-Wide Service Technical Case Study.(http://blog.magenic.com/michaelr/archive/2006/08/02/2956.aspx)
This document illustrates the process of implementing Team System on Microsoft and the problems they faced there.
If you haven´t read, you should be reading right now!