When we released DSL Tools for VS2008, the migration story from VS2005 was not great: basically we provided a sheet of manual instructions which led to a fragile and long-winded experience. This time we’ve done a lot better. In the VS2010 DSL SDK Beta1 you’ll find a migration tool that converts your projects and solutions for you automatically. We’ve been using this internally to convert samples, test projects and so on, and it does a lovely job. There are links to a video showing the tool in use, and some documentation on the Downloads tab of the DSL Tools Code Gallery. Life is good.