> All of this is built around the simple idea that real friendships happen when you actually meet in person.

I understand the sentiment - but this would make it useless for my closest friends - we live in different cities and countries now - and it would take years to fill in the social graph. We would all have to travel and meet everyone else.

I suppose this is alleviated by the talk to a friend of a friend feature - but does sound like it partially excludes friends with limited mobility.