I am still trying to find more value in the Team System/TFS combo.  There are some really great benefits that we are seeing in terms of using TFS for our source control, but a lot of the things I had hoped to do with TFS are simply not good enough to actually use.  Unit testing, continuous integration, bug tracking, code policy etc.

Here are a list of addin widgets for team system:
http://teamsystemexperts.com/widgets.aspx

I’m hoping that some of these can provide some added value to the entire system.