If you are curious to know what the new features of Visual Studio Team System 2008 (The client to Visual Studio Team Foundation Server 2008), then check out this feature list.  Note, there are some features of Team Foundation Server 2008 mentioned, but I will follow up with a separate link on Visual Studio Team Foundation Server 2008.

Here's the link: http://msdn2.microsoft.com/en-us/library/bb385832(VS.90).aspx

~ Robert Shelton