I think it could be interesting to see the "karma-change tally" (don't know how to call it) on stories, people and comments.

The rationale is that to me, there's quite a difference between a comment that has 1 karma because there was no upvotes/downvotes and one that has 1 karma because there was 20 upvotes and 20 downvotes.

So, we could have something like:

5-3=2 points by username