I have recently involved in a migrating existing projects from maven1.2 to maven2. We used maven-xdoclet-plugin for generating struts config xml file. This plug-in used to work OK in maven1.x but failed in maven2. It was not generating those actions & forms properly in struts config xml file.
I recently found a fix (thanks to Google) for this (and it is working) in the form of maven antrun plug-in.
For more info or to see the actual code snippet, please do visit this blog