Is there a way that you can cap the number of enrollments in a class? I have a situation with open enrolment and a limited amount of space. Classes can fill up very quickly. I would like to limit the number of students without registering them manually or needing to give out an enrollment key.

Also see this forum for what I'm talking about:

http://moodle.org/mod/forum/discuss.php?d=90#85992