I totally agree. That would be a pretty great winter themed download.
Too bad the other winter olympic disciplines don't lend themselves to serious Move simulation except bobsled maybe. You control your bob by pulling on two ropes basically. That should lend itself to using two Move sticks.
Thinking about (two) ropes controlling a vehicle brought me to parachuting. You also control a parachute by pulling on two ropes - think about how cool it would be to have a little Pilotwings action in HD, where you jump from a plane, pull the cord at the optimal time and then guide your parachute onto a target on the ground with two Move controllers.