Yes, it will get more interesting. How interesting, and when, are more difficult questions to answer.
Right now we're working on a wiki solution, and a site UI redesign project, and a forum replacement project, and a half dozen smaller things. Still, recognizing and rewarding contributions is top of mind and I'll be spending a lot of my time on it in the next several weeks.
It sounds like you've been around these sorts of systems. Are there any examples you can think of that really stand out? I'm game to try just about anything. Personally, I'm inclined to consider a model closer to the mmorpg ladder concept. Implementing it in this context though could be tough.
Bob