Why Not Limit Votes Based On Comments & Contribution?
The entire point of the boards is for discussion, yet so many people dodge the bullet and vote, simply because it's the easy way out.
I believe it'd be cool to have a point system where posting threads and comments gives you a set amount of points, which you can then use to upvote or down vote topics. Obviously, there would need to be some "rules" laid out in the system to prevent abuse.. but overall it would be a step in the right direction.