There’s a nice video demo featuring Test Impact you may find interesting here:

http://blog.nfocus.co.uk/2010/03/vs2010-test-impact-one-giant-leap-for.html

The demo is a little under 20 minutes and actually touches on quite a few of the integration features in VSTS / TFS 2010 including the Intellitrace Data Collector, Video Recording, and the experience of logging bugs directly from the Test Runner and all the automatically filled in bug data that you get with that.