Reviews of Hotels, Flights and Vacation Rentals
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SmartMoney Power 30

For many of today's vacationers, the first step in planning a trip is logging on to TripAdvisor. The travel-review Web site started by Kaufer a decade ago has become the 800-pound gorilla of the industry, says Douglas Quinby, senior director at research firm PhoCusWright, with the power to make or break hotels and other travel providers.