Until now you could only use DSL Designers in Visual Studio (Professional and higher editions). This limited using DSL’s to those development team roles that are comfortable using Visual Studio (developers and architects).
However, this has now changed with the announcement of the Visual Studio 2008 Shell. Now users can use the DSL Designers that run in Visual Studio in a stand-alone shell. So now we can also use DSL designers for supporting non-technical team roles (such as business analysts) in a software factory.
This is what a stand-alone DSL can look like: