I don't know if this has been suggested yet, but how about an activity log that shows the amount of time you've been on either the forums, NG, or both?
Current time and date?
Forum organizer that will re-order the threats from the most recent post, to your most recent viewed, or posted thread? (Thinking of idea's hard)
Maybe some kinda ban meter, or mod warning level so peoples know when to chill out, or face being banned?
Or.. my last idea userpage stats that tells how many hits you have, and view to responce percentage..
I just came up with another one...
User post approval points, where users rate other users on how well they're posting. And let's say someone who has a bad score gets an automatic PM sent to all mods for a head-up warning. I wont go into full detail, it needs a bit of tweeking, but you'll figure it out. It'll fix up the forums alot.. Then we'd be able to focus on removing some of those rules.. :)
And another idea I just came up with is something as simple as a link, to proper posting/typing. Like double spacing after sentences, comma placement, and all of that good stuff.. Ok, I'm out of ideas now.
I'm sure most of 'em are good ones.