I can't wait to try walking on the stuff between Dawnstar and Windhelm...I hope I don't fall through.

http://img585.imageshack.us/img585/3503/maplabels.png

It would be awesome if they made ice/snow slippery or smth. I don't want to run up and along an 89° wall off ice... It would also bring in a new tactic to fighting in the mountains - curling barbarians.