in house mail system
I know you already have a thing set up where people can contact others using personal email accounts, but what if you had a little messaging system where you typed in the user you wanted to send a message to and it appeared in a "Mailbox" in the "My Account" space. The Mailbox would house the compose mail section and the Inbox section. You could also mail people by clicking a link in their Profile. It would not use outside email, but instead just have messaging. This would be quite useful for things you want to discuss with others outside of the forums, yet not divulge your personal email for privacy reasons. Admins would be able to read all these mails (of course). If anyone agrees, post a reply. Obviously the creation of apps takes precedence over this, so I don't expect to see this anytime soon.