San Francisco's Tournament of Business-School Brilliance

A roomful of aspiring Wharton MBAs. A week spent in virtual isolation in San Francisco. Two dozen ideas for Internet startups. And enough ambition to fill a football stadium. Welcome to the Innovation Tournament seminar, a class taught by Karl Ulrich, a professor at the University of Pennsylvania's Wharton School, that has spun out a handful of venture-backed companies and is wildly popular among the MBA seekers at this prestigious Ivy League institution.