I make a short break during my vacations to announce you that the DSL SDK is now part of the Visual Studio Visualization and Modeling SDK. The Visual Studio Visualization and Modeling SDK (in short VsVmSdk) contains both the DSL Tools SDK, (what we named DSL SDK in Beta1 and Beta2), and some content related to the Architecture tools extensibility (the architecture tools being the UML designers, and Layer designer of Visual Studio Ultimate).
You can have more information from http://code.msdn.microsoft.com/VsVmSdk, and the direct download for the SDK is available from here.
As far as DSL Tools are concerned, this mainly bug fixes, and we took into account a few suggestions. There is also a new sample showing how to extend the DslDesigner itself (see the download page of the Visual Studio Visualization and Modeling SDK)
I’ll explain more next week when I’m at work, but for the moment it’s time for me to come back with my family :-)
Enjoy the SDK!