"[TripAdvisor.com] launched three years ago as a collection of destination advice, TripAdvisor now specializes in consumer reviews of hotels, resorts, inns and packages. More than 90,000 hotels are listed, and popular properties have 60 or more consumer reviews. Some hotels can be booked via TripAdvisor's new QuickCheck system (note: QuickCheck might not work if your computer blocks pop-up windows). Using a combination of editorial and consumer reviews, the site ranks hotels according to popularity. TripAdvisor CEO Steve Kaufer says rankings are independent of commission agreements. "In some cities, the top hotel can't be booked from our site, so we can't make any money on that," he said. The site sells sponsored links for hotels, airfares and packages, but these are clearly marked. With so much going on, navigating the site can be confusing, but it's worth the effort."