Per Saddo, after trying the thank you's he realized that he didn't like them, and already got rid of them. And here is what he said about the +/- numbers.

Orginally posted by Saddo
OK just a little update i have added a little number feature to the post titles and re titles to show just how many reps a post got....

it will also show neg reps if they where given

average reps for a post if neg will show as red
average reps for posts if pos will show as green.

should make intresting reading
So it basically shows everyone what post received rep, what kind of rep, and how much rep you received for the post.