Awesome new Web/Load testing reference guide available
Check out the following guide for answers to many different questions on web and load testing: https://vstt2008qrg.codeplex.com/
This covers the following topics:
SETUP CONSIDERATIONS
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
TEST CUSTOMIZATION
ITEMS CHANGED OR FIXED IN VSTS 2008 SP1
GENERAL COMMANDS AND TRICKS (NOT VSTS SPECIFIC)