My most recent post on the Patterns & Practices (P&P) schedule was prompted by a question I received asking when to expect an update on the document How To: Perform Capacity Planning for .NET Applications.  As I have since learned and as is posted on the schedule at patterns & practices: Upcoming Releases there are no future releases planned at this time.  The original guide, tested against the 1.1 framework at the time, was designed to be timeless, in that many concepts still apply.

If you still thirst for additional information on capacity planning and performance testing or the discovery, composition and consumption of high quality development guidance you'll want to check out the P&P Guidance Explore on codeplex: