The Patterns & Practices team has released two new documents.  The first is a guide to help you get the most out of Team Foundation Server.  The second will aid all of you web application developers who have been looking for better ways to performance test your apps:

Team Development with Visual Studio Team Foundation Server
This guide shows you how to make the most of Team Foundation Server. It starts with the end in mind, but shows you how to incrementally adopt TFS for your organization. It's a collaborative effort between patterns & practices, Team System team members, and industry experts.

Performance Testing Guidance for Web Applications
This guide shows you an end-to-end approach for implementing performance testing. Whether you are new to performance testing, or looking for ways to improve your current performance testing approach, you will find insights that you can tailor for your specific scenarios.