We need to limit some courses to a certain subset of users. Cohorts (in 2.0) seem to be the way to go about managing such a set of users, but we want courses to be self-enrollable to members of a cohort (instead of enrolling the whole cohort like you can do now). Does such a thing exist?
FYI: I've created an issue for this: http://tracker.moodle.org/browse/MDL-23875.