Good work for making this. I see a few hypotheses here on how behaviour will be changed...I'd like to see another post in a about a week or so on peoples' experiences using this extension.
I'll add it when I get options running, which unfortunately needs a pretty big change to make this more flexible. The source is up, you can see it's pretty simple.
Did you want your comments' points to be hidden, or your points at the top of the page (or both)? I sort of liked when it showed your ratio instead of points, I could get that going as well.
One request: I'd like to hide my own karma.