For teams using IDEs other than Visual Studio, the TFS MSSCCI Provider is the standard integration point for TFS version control. Recently, we did some work to ensure that the Mainframe Express IDE, offered by Micro Focus, would be compatible with the MSSCCI provider so that teams developing for the mainframe could consolidate their source code with other teams in their organization. The result of this effort is a Knowledge Base article that explains how to configure the TFS MSSCCI Provider to enable compatibility with Mainframe Express.
Check out the KB article here: http://support.microsoft.com/kb/968368
The TFS MSSCCI Provider for 2008 can be downloaded here: http://www.microsoft.com/downloads/details.aspx?familyid=FAEB7636-644E-451A-90D4-7947217DA0E7&displaylang=en
You can read more about Mainframe Express on the Micro Focus website: http://www.microfocus.com/