Thanks to Rod Le Quesne for the heads up on this:
"TeamPlain Web Access is a web interface for Microsoft® Team Foundation Server that allows managing work items, shared documents, reports and source control repositories."
"As a result of Microsoft's acquisition of devBiz, TeamPlain Web Access is now available as a free download. "
Client Access Licenses (CALs) for Microsoft Team Foundation Server are still needed for users connecting to TFS.
Note: Make sure you download version 2 - some significant changes. The forums have also now moved over to be Microsoft monitored.