I have seen this on the vBulliten forums, and I think it would be very good.
It is where you get points for posting (2 per post), and then with those points, you can go to the forum store, where you can buy things with your points (e.g. being able to have a custom title, adding a glow to your username, being able to have a sig image).
Could someone please do this?
(For an example of the store, look at this
I have no sig. Damn, ruined it.