Brian Keller took the time to find and tag all of the Team System content on Channel 9. See his blog for the details (New Tag for Discovering Team System Videos on Channel 9). Thanks, Brian!
We recently started tagging new Visual Studio Team System-related content on Channel 9 with a VSTS tag to make them easier to discover. I also just finished tagging all of the older Team System-related content as well. There were several great videos out there, including some that I had never even seen before!