One uses a honeycomb-type box containing tiny metal balls, called a particle dampener, on the end of the ski to help dissipate energy and lessen the vibrations skiers feel while skiing down the slopes. Here's a telling quote from a story from Nanowerk News on the dampener:

Graduate student Brian Kenton, who is the teacher's assistant for the class, has been building his own skis out of his garage for the last four years.

"I've made about 12 pairs, but this is definitely the first time I've seen one with a particle dampener on it," he said.

Sure, it sounds like something Captain Kirk would use skiing the slopes of the planet Alderaan, but it's also not too far from reality. Here's link to the Nanotech News story; there's another one here. Watch a news story on Leang's class and the future of nanotech skis after the jump.