SEGA's landed a demo of Vancouver 2010 on Xbox Live Marketplace.
The file's small at 684MB and offers the men's Super-G and Landing Zone events to play. This should give you a taste of the "speed and adrenaline" the game purports to focus on.
Vancouver 2010, developed by Eurocom, is due out here on 15th January.
The gamepage below has plenty more information.