The next Community Technology Preview (CTP) of Visual Studio Team System code-name "Rosario" April 2008 is now available for download. Check out Jeff Beehler's blog for more details about the latest feature sets that have been included in this CTP edition.
As you may or may not know, Visual Studio Team System is the brand-name of Visual Studio that includes both client and server components. The client components build upon Visual Studio Professional Edition. Those components are called Architecture Edition, Developer Edition, Tester Edition, and Database Edition. The server side is called Team Foundation Server (TFS). TFS is a server product that has features for project management, documentation management, source control, and change management.
So to check out the CTP for yourself, you can download the VPC images from our download page.