Hello!
I've been playing and I've added new functionality to the forum - the ability to give (or take away) other members "Reputation". Reputation points are visable as stars below your avatar. Each size of star relates to a different amount of reputation, there are four sizes:
15 reps
100 reps
200 reps
2000 reps
So, for example if a user has 30 reps they would have two small stars, but if they have 100 reps they would have one slightly bigger star.
You can adjust peoples reputation by clicking on the +- button next to the stars.
Matt