JD and his p&p team are on fire.  In the space of two days last week, they released both the Beta1 of the TFS Guide and the Beta1 of the Performance Testing Guide.  They both look great and are ready for your feedback to make them even better.  JD writes the following description of the perf testing guide in a recent blog article:

Today we released our Beta 1 of Performance Testing Guidance for Web Applications Guide.  It shows you an end-to-end approach for implementing performance testing, based on lessons learned from applied use in customer scenarios.  Whether you're new to performance testing or looking for ways to improve your current approach, you'll find insights you can use.

Good stuff...check it out today!