A new sport is blowing up into snow country. In snowkiting, airfoils pull skiers across frozen terrain. Snowkiter can hit 60 moh, ski uphill or downhill, be airborne for 100 feet and even throw in a few tricks before landing. A good skier can master the basics in a few hours with an airfoil starting at about $400 (ozonesnowkites.com). Part of the sport's growing appeal: Snowkiting manages to sidestep two pesky requirements of skiing: a hill and a lift ticket.