What is Microsoft Visual Studio Team System?
Microsoft Visual Studio Team System 2008 is a platform for productive, integrated, and extensible software development life-cycle tools that helps software teams by improving communication and collaboration throughout the software development process.
Visual Studio Team System Editions:
Provides links to topics discussing an extensible team collaboration server that provides work item tracking, source control, reporting, and process guidance.
Provides links to topics discussing a set of integrated application design tools for service-oriented development.
Provides links to topics discussing code quality and performance tools that enable teams to build reliable, mission-critical services and applications.
Provides links to topics discussing advanced load testing tools that enable teams to verify the performance of applications before deployment.
Provides links to topics discussing tools that enable teams to efficiently develop database applications, including working in isolated development environments, managing schema updates, and sharing changes through source control.
Does this include Visual Studio 2008?
Any of the Visual Studio Team System editions builds upon the feature set in Visual Studio 2008 Professional. Any of the features that are included in VS 2008 Pro are something you also get in any of the VS Team System editions.
For a feature comparison of the VS Team System editions you can check out this page: