Currently, the mGen development is on-hold, awaiting more feedback from the Medical Informatics community and the NLG community. The current release of the system is sufficient for daily use at the clinic, but it should be noted that further improvements are desired. Improvements in the documentation and extraction of more generally usable components from the more specific MedView project are planned though. Basically, we want to see if people out there can find uses for our system - if they do we are more than willing to continue and further improve it.
If you are interested in developing and improving the system, it's just a matter of contacting us and we'll set up developer accounts at the SourceForge site for you. If you are interested in using the existing system, check out our files section.