DSL Tools Nov 2005 CTP on MSDN
As Jochen and Stuart have already posted, the Nov CTP is on MSDN, so you can go download it now. Most important it's the version that runs on the RTM bits of VS 2005. There has been lots of interest in getting a version of DSL Tools that runs on RTM VS 2005, so I hope you'll all give it a try. There's also a couple of new features: validation and deployment. You can read more about them from Stuart.