World's Largest TFS Deployment?

I have not heard of any customer going bigger than this:

Microsoft just passed the 3,000,000 Work Items mark! And fast approaching the 50million source code file count. All that across 27 instances, three of which are Rosario builds and 24 on TFS 2008 SP1.

Thanks to Joe Schwetz for sharing these internal use numbers - makes me proud that we have such confidence in our own products that we not only dogfood them, but also support our core business of software development using Team Foundation Server.