In the category essential tools for the BizTalk consultant; here we have the Throughput and Capacity Tester made by Larry Beck. What else can we ask for?
Update: The new release has been renamed to BTSPerfTester 1.0
The BizTalk Performance Tester (the Tester) is an application intended to assist architects and developers quantify the performance characteristics of their BizTalk solutions. The application meets this objective by performing stress tests against the target solution and monitoring the application performance.