This would include both the service interfaces, as well as the DTOs that they use.
I'm still trying to figure out the best way to do this. The main question is whether or not resource loading framework will be in this module. I think the answer is no, but that means we need to move the module-specific service locaters (KIMServiceLocator, KEWServiceLocator, etc. out to a different module).
Jason or Jeff may already have some things in mind as well regarding how we might approach this breakdown from a maven perspective.