I added some basic little plugins to the board that give users karma and XP.
Karma can only be bestowed upon you by others. If you like something someone posts (or you're just feeling in a giving mood) you can click give karma and the user will gain +1 karma (don't worry you don't lose any from your pool). You can only hand out 1 karma point every 15 minutes to prevent spamming of karma.
XP is earned by making posts and replies. I've already given everyone a starting amount of XP based on the number of posts they have placed since being here.
Neither of these really *DO* anything for you. They are just for fun. It's possible in the future the devs may come up with some kind of a system to "spend" karma or xp or "level up" your profile or some such. For now it's just window dressing. Figured it was Far Cry-ish.
I may also look into adding "Kyrati Rupees" and collectibles to collect