I didn't see this in the features or admin or through a search of this forum. We want to limit the number of people who can have a membership to 400 at any one time. Is it possible to limit the number of memberships available for sale at any one time through the admin?
Larry Lewis of Jlogica has developed such a plugin: http://jlogica.com/jess/?act=product&id=16 It works like a charm!