Natural for Ajax Projects

Our site has a large, complex mainframe system (in financial services). We are looking at redoing some online portions of the system in Natural for Ajax. We have loads of questions, e.g. Change Control (how do we administrate multiple people working on the same project), methods of screen validation in an SOA environment, some technical issues as well as general working methods doing projects in Natural for Ajax.

Has anyone out there tried to incorporate Natural for Ajax applications with existing, complex mainframe systems? If so, we would like to get in touch with you to discuss some of these issues.