If you’d like to kick the tires a while, Brian Keller has created a very nice virtual machine complete with a sample application, data, and some hands-on labs. Here’s a link to his blog post announcing its availability: http://blogs.msdn.com/b/briankel/archive/2010/06/25/now-available-visual-studio-2010-rtm-virtual-machine-with-sample-data-and-hands-on-labs.aspx
The VM comes in a number of “flavors.” There’s one for Hyper-V, Virtual PC 2007 SP1, and Windows  Virtual PC.
The VM has VS 2010, Test Professional 2010, Team Foundation Server 2010, SharePoint 2010, SQL Server 2008, etc., installed. Brian has created a number of hands-on labs and demo scenarios that will walk you through various aspects of the 2010 product line, including:
- planning your projects with TFS 2010
- using the Architecture Explorer in VS 2010 Ultimate to analyze your code
- understanding class coupling with VS 2010 Ultimate
- an introduction to test case management with Microsoft Test Manager 2010
- an introduction to Coded UI tests with VS 2010 Ultimate
- debugging with IntelliTrace using VS 2010 Ultimate
- code discovery using the Architecture tools in VS 2010 Ultimate
- authoring and running manual tests using Microsoft Test Manager 2010
- branching and merging visualization using TFS 2010
It’s quite a list of goodies, eh?
There isn’t a web load test scenario included in the hands-on lab docs, but here are some links that explain how you would create web performance tests and load tests, including a couple of walkthroughs:
- “Web Performance Testing with Visual Studio 2010” from MSDN Magazine: http://visualstudiomagazine.com/Articles/2010/06/17/Web-Performance-Testing-with-Visual-Studio-2010.aspx?Page=1
- “Creating and Editing Load and Web Performance Tests,” from the MSDN documentation (this includes some walkthroughs): http://msdn.microsoft.com/en-us/library/ee923687.aspx