Anyone that knows me will tell you how disappointed I am that Microsoft didn't include Sequence Diagrams out-of-the-box with the VS 2005 Team Editions (SA and SD version at least). Even a non-UML compliant activity diagram implementation (ala Class Diagrams) would be sufficient. To add salt to the wound the DSL Tools team has proven slow, at best, at providing a robust development experience. The lack of usable comprehensive DSL samples in the VSIP SDK is contributing to the perception that Software Factories/DSL implementation is simply an alpha academic exercise; it of course isn't.
Suggestions: 1) leave the academic high-horsing to the IBM folks and let's produce some usable DSL tools so that practitioners and ISVs can get to adopting the Software Factories concepts and Visual Studio DSL tools without having to invest a life-time producing usable implementations. And 2) transparency; include the DSL source for Class and other out-of-the-box diagrams to grease the wheels for adoption. The PDC sample was one of the best I've seen but how many people have seen those samples?
I'll conclude by saying that Software Factories and DSLs are both things I'm quite excited about. As a commercial software architect and consultant I can't wait to see some good tools.