According to Rob Caron, VSTS July CTP will be ready for download in the MSDN Subscriber Downloads at the end of the week. So, what's new in July CTP, well at least the preliminary list can be found here. Most are fixes or very well received improvements, but there are a couple of features that look promising: More Process Guidance Launch Points, and the Team Foundation Server Proxy for remote offices. By the way, you will need again a couple of servers to test this release, because the single server configuration isn't supported for this release.
Good download ...