Celebrities flock to Sundance, Utah, of course, to flaunt their Q ratings and take the measure of the great entertainment imperium in the heady mountain air. But the rich and famous are also notoriously inclined to get a little too heady when left to their own devices-and Sundance also has the perfect setup for that dilemma, reports Fortune writer Claudia Wallis: the Cirque Lodge, "the rehab center du jour for those who can afford to go anywhere"-where rates top out at $1,595 a day for a minimum 30-day stay.