Last week "pre-release" of the Team Foundation Server Migration and Synchronization Toolkit got released. This toolkit makes it easier to develop solutions for migrating to (or from) Team Foundation Server, as well as providing an engine to help two content repositories in sync (e.g. a 3rd party bug database with Team Foundation Server's work item database). You can find  more information on Brian's blog. For a Channel 9 interview with Matt talking about this toolkit a few months ago click here.