Facebook and TripAdvisor now help you tap your friends' travel experiences and plan the perfect trip. "Starting today, when you visit TripAdvisor while logged into Facebook, the site will become your personalized travel planner, complete with friends' reviews, a map showing places friends have visited, and a list of their most popular destinations.
TripAdvisor is a new instant personalization partner and becomes customized for you by using your public information and list of friends from Facebook to show you friends' reviews and other content you might find interesting.
For e.g., when you're researching a location, hotel or restaurant, you'll see friends' reviews first, so you can make better vacation decisions. And if you need some inspiration, the new personalized TripAdvisor home page will now show a world map with all the places friends have said they've been using TripAdvisor's Cities I've Visited app. Don't just look through your friends' vacation photos on Facebook; get tips from them and go on your own adventure.
More Info: TripAdvisior