I've been so immersed in getting V1 DSL Tools out the door, that I see I haven't posted a blog entry yet this year.
I'm also very late in telling you about the new release of DSL Tools. The main purpose of this release was to integrate DSL Tools into the VS SDK, which it now is. There's also a significant refresh of the help documentation, which is also integrated.
More details from Gareth at: http://blogs.msdn.com/garethj/archive/2006/02/04/AnnounceFebCTP.aspx