Have you considered other applications of the underlying system? For example, in our area we have several meetup groups that have constant calls out for present

Have you considered other applications of the underlying system? For example, in our area we have several meetup groups that have constant calls out for presenters, but there are also requests for certain topics to be covered. So, a "rolling" version would be really useful (e.g. the possible presenters that were not selected this month, are automatically kept in queue for next month).