Just a quick note as I couldn't find it anywhere during a quick search during my lab. I wanted to see if the Load Test results recorded from the 2005 edition of Visual Studio Team System would be viewable in Orcas.

Thankfully I happy to say as of Beta2 this works just fine. In fact you can make the most out of some of the great new features in the post test run ui which will make analysis an even better experience. See Sean Lumley's blog for for further info on the new Orcas UI for post test run analysis: http://blogs.msdn.com/slumley/pages/load-test-execution-post-run-ui-enhancements.aspx.