In addition, where the score used to be displayed as "points," it's now displayed as "ups." There are a few glitches still (when you vote it says "points" still, for instance), but this is a potentially temporary change.
One change that we should see immediately is that the stories that are currently controversial, but formerly had a score near 0, are now bubbling up on the hot page.
We're not sure the exact ramifications of this change, but we're going to give it a couple days to see how it works.