Controller layout of private messaging

Hey am after some advice on how to layout my controllers and models for inbox/sentbox private messaging functionality.

i have it all working at the moment but i believe it to be quite messy. i have this so far.

controllers/actions: mbox/notification_controller.rb   - list   - destroy mbox/privmsg_controller.rb   - inbox   - sentbox   - destroy mbox/user_comments_controller.rb   - list   - destroy privmsg_controller.rb   - new   - show   - reply

can someone give me some advice on a good way to layout my controller's actions, to simulate a linked-in sorta messaging system?