Visual Studio Team System is a suite of tools targeted at a number of roles in the software development lifecycle. Here are some resources for getting up to speed on it.
Team System Webcasts
Webcasts about Team System
here.
Team System Blogs
Installation of Team System
Walkthroughs
The walk throughs have a number of items that are just place holders at this time. There are areas completed, including Creating Build Types and Source Code migration which are helpful.
What is happening with VSS?
You can find out by looking at the VSS
road map.