Markus, Arno, Bernd an me have written an article about MDSD and oAW which has been published on The ServerSide.
It is called The Pragmatic Code Generator Programmer and is about a reimplementation of an exerceise from the best selling book "The Pragmatic Programmer" by Dave Thomas and Andy Hunt. We've used openArchitectureWare 4.1 and Xtext for the reimplementation, of course.