A couple of months ago, I mentioned that one of our MVPs (Mike Azocar) was running a "Coolest Team System Gadget" contest.  He has just announced the winner of the contest: Mathew Rowan for TFS Working On, a tool to help you track the time you spend on tasks.  The tool is availble on CodePlex here: http://www.codeplex.com/TFSWorkingOn

I haven't played with it myself so I can't give you a personal testamonial but I hear a lot of people asking about time tracking lately and it looks cool.

Brian