Today I met some young entrepreneurs from France, Mehdi and Lucila. They are currently working on a seed-stage startup called MeetmyPlanet. A simplified way to think about the site is Tripadvisor meets CouchSurfing (yes, i hate doing that).
I believe that the idea came from extending CouchSurfing's online service by providing more information and interaction beyond just hosting travelers. CouchSurfing itself is a pretty cool service since it's a nonprofit that has serviced over 530,000 people in 228 countries since 2003. It's primarily for college students and young twenty-somethings that are cost-conscious for their travels.
MeetmyPlanet started late last year and has over 10,000 users, and is targeting the same market plus a wider audience that simply wants to meet locals or fellow travelers in the same cities of destination. Anyway, check it out.