At most companies, going AWOL during daylight hours would be grounds for a pink slip. Not at Best Buy. The nation's leading electronics retailer has embarked on a radical--if risky--experiment to transform a culture once known for killer hours and herd-riding bosses. The endeavor, called ROWE, for "results-only work environment," seeks to demolish decades-old business dogma that equates physical presence with productivity. The goal at Best Buy is to judge performance on output instead of hours.