I was in Barcelona all last week, so I'm behind on email and blogs. I missed a couple of great posts from various folks involved in modeling at Microsoft. Gareth blogged about the text template engine in the DSL toolkit. Ali Pasha blogged about the relationship between the Distributed System Designers and the System Definition Model. And R.Ramesh pointed to the second and third parts of the Channel 9 interview with John Stall from the Class Designer team.
BTW, if you want to keep up on all the goings on the VSTS world at large, you have to subscribe to Rob Caron's Blog.