While it's an outright feature req for the forums software, I'd like to see the ability to save draft posts. I think we could have it save them for, say, 14 days (since the idea is that it's a short-term, "I don't have time to finish my thought but I'm not ready to post yet" deal), then automatically delete it. The button could be at the bottom, next to Post and Preview.
Also, I noticed that SMF allows for a calendar feature. That may be useful for scheduling events, or at least letting people know about them (e.g., IRC chat sessions, etc.). I definitely see that being a major thing later on, when we have a fanbase - "Come hang out with the people who made your favorite game! Also, get more info about the tournament next month!"
I also agree with the things you said, morgul.