This is a really big deal for customers. The toolkit is now released on the codeplex site.
For those who aren't aware of what this is:
The purpose of the TFS Migration and Synchronization Toolkit is to enable customers of Team Foundation Server (TFS) to build custom tools that enable migration and synchronization with other version control (VC) and work-item tracking (WIT) systems. Customers have asked us for this toolkit to help them integrate TFS into their existing development environments