The VSTS Rangers just published a quick reference on Visual Studio Team Test. The guide covers the following:
WEB TEST CONSIDERATIONS
WEB SERVICE TEST CONSIDERATIONS
UNIT TEST CONSIDERATIONS
LOAD TEST CONSIDERATIONS
LOAD TEST RIG CONSIDERATION
PERFORMANCE DATA COLLECTION AND USAGE
LOAD TEST RESULTS STORE INFORMATION
ITEMS CHANGED OR FIXED IN VSTS 2008 SP1
GENERAL COMMANDS AND TRICKS (NOT VSTS SPECIFIC)
At a first glance it looks really nice and contains lots of very practical content.
The guide is available on CodePlex here.