Great Plugin. I'm experimenting with it on one of our news sites. http://www.knvotv48.com.
I'd love to see a addon for this plugin which would allow users to redeem the points for prizes, or other admin created products. (kinda like a store, but with the points being the currency.)
Basically we would like our contributing visitors to be able to redeem their points for T-shirts, coffee mugs, bumper stickers, etc.