A search on the forums didnt return much, and Googling returned a cached copy of a similar feature request from a previous version in a now deleted forum.
The customer needs something similar to Yahoo Groups, where you have to join a forum before you can post, either automatically or by asking the moderator. I'll then need to maintain a list of which forums a user is a member of. I can edit the message that says "Access Denied: Post Permission Denied" and add a link to email the moderator of that forum. Do you know which controls I could use to get the moderator's email address, given that the CS model allows for multiple moderators of any forum? As for forum membership, I think that's something I'll need to build myself.