Last August, Microsoft announced they would be including the lab agents (i.e. licenses) with TFS 2010 as well as Visual Studio 2010 Ultimate with MSDN and Visual Studio 2010 Test Professional with MSDN (link). As of today, Microsoft has made another great licensing announcement – the Visual Studio Load Test Virtual User Feature Pack 2010.
With this feature pack, you can simulate as many virtual users as you like without the need for purchasing additional virtual user licenses. This change only adds to the already great value provided with the Visual Studio 2010 Ultimate with MSDN subscription.
You can find more information regarding this release via these links: