I've been going to alot of other forums recently and seeing alot of cool features there, and I've been thinking about implementing (stealing) some of these systems and putting them on our forums. And I'd like to hear the input of the community as well as their suggestions.
1.) A Spoilers tag - A spoilers tag is found on alot of manga forums, to hide a certain portion of text, and you would be able to see the text at your leisure by simply clicking the "open" option. It has more uses than simply hiding spoilers though. It can add flavor to post, etc.
2.) A reputation system - I'm iffy about this, a reputation system is basicly as it sounds. It might make some posters strive to be better or what have you.
3.) On Starmen.net they have a thumbs up, thumbs down system, basicly shitty post get thumbs downed, while good post get thumbs uped. etc. This could be used to caculate reputation.

4.) Titles - Some forums have titles, similar to "emblems, below". We have this option but we don't utilize it to it's fullest potential.
5.) Emblems - I think this is a good way to show peoples creditionals. basicly, it works the same way it does on starmen.net, you get an "emblem" underneth your avatars titles, and it's in the form of a small picture, for instance,
I won player of the year for 2004 in mk64, I would get a little mario emblem or something.
Or
I donated 200$ to the site so I get a money symbol in the color gold, or silver if i donated 50$, so on and so forth.
Also, winners of competitions such as karters contest, or "karter mafia" would also get emblems for winning and participating.
6.) Microphone input - I'm not sure if this is possible, this is entirely new, basicly, record an audio sample through a microphone, and it would show up as a imbedded media in your post. You wouldn't have to write, you could simple speak. I've spoken to alot of karters in this community over the phone and microphone already.
6.) The ability to have your forum name be a picture, only one rule to this, the picture must include your name in it.
7.) Have the option to have our name a different color or something... bleh, now i'm just running dry.
These are just a few suggestions, anyone got others?