The September CTP of the Visual Studio SDK is now available for download. Please note that this CTP should be used to develop packages targeting the VS August CTP. I know it can be kind of confusing about which VSSDK matches which VS release, so here is a mapping for convenience:

The September VSSDK now contains 6 completed "reference" samples which conform to our new coding & commenting standards. Additionally, we have updated help content and added the SDM SDK. Please let us know if you have any feedback about the SDK or any problems with it.