I'm pretty sure you get 1 point everytime someone votes. I'm not sure though. There are a few threads going in Suggestions & Feedbacks that might answer your question.

This shouldn't be a popularity contest. Who cares how many points you have, I have.......only 40 points, but do I care how many little green dots I get beside my name...not likely.
Nochowderforyou Reviewed by Nochowderforyou on . rep points so now i think i understand the rep points,how many do u get each time someone approves?i only got 10 pts guess noone likes me lol Rating: 5