Available now are patterns & practices performance testing How Tos. They represent current recommended practices. They include How To Step Through Creating a Load Test in VS.NET 2005. On Channel 9.
Also find: How To Conduct Performance Testing; How To Conduct Performance Testing with Automated Load Testing Tools; How To Control the Number of Load Test Iterations in VS 2005; and so on. Good stuff eventually on its way to post on MSDN.
Visual Studio, Microsoft, Performance Testing, Guide, Channel9