TRIBE

Tribe is a social network started in the San Francisco bay area. Tribe is similar to social networks like [Facebook](http://www.crunchbase.com/organization/facebook) and [MySpace](http://www.crunchbase.com/organization/myspace), but allows users to create their own personal networks with other users; forming "tribes." Anyone may register as a new tribe user, and may then define their immediate network of friends, either by choosing from existing members or by inviting new members to join. Each of these users may in turn define their own network of friends.