I saw where Midcow was saying how many points he thought that things were worth, so here's my speculation:
1. "Thanks" are now worth 3 points, not 1 point like they used to be (it's been this way for a little while now)
2. The amount of reputation points awarded when someone uses the "scales" button appears to be the amount of reputation points that they have divided by 40. I don't know how it handles rounding, yet. For example, if someone has 120 reputation points, then that person will hand out 3 points when they "approve" of someone's post. If someone has 240 points, then that person will hand out 6 points, and so on. I don't know if there is a minimum value handed out these days, but newbies used to give out zero points when they tried to give rep.
3. I don't know if red chicklets follow the same scaling as green chicklets in regards to how many points are taken away. For example, I don't know if someone with 1200 points would sock someone with -30 points if they "disapprove" of a post. On a related note, please don't hit me with red chicklets...I'm really not that curious to find out!
Adam