1. old-style layout where the forum is just header posts and replies underneath. I prefer that for a slow moving forum.
and/or
2. Ideally I would like it split screen, with the header and reply header on the left hand side and the message on the right hand side. That reduces clicking by about a half and you always know where you are.
Microsoft have went that route with some forums but made it too slow-loading and probably too complicated.