Nice idea, nice execution but I can see it going downhill. I sympathize with the idea/intention but it feels like a dating site. On top of that there are some privacy concerns. Kudos for the clean design, speed and ease of use of the page.
Just like couch surfing, anything like this will become a dating site. Usually people who knows how to travel don't need sites like this, and they can meet interesting people where ever they go. Instead sites like this it would be better to find a seasoned traveler and learn from him/her.