Social networking isn't search. It's much harder to change social networks than OSes or browsers or what have you. If you plan on switching, you have to get all

Social networking isn't search. It's much harder to change social networks than OSes or browsers or what have you. If you plan on switching, you have to get all your friends to sign up and use the service.. and then they have to get all their friends to make it worthwhile.. ad nauseam. This is why Facebook doesn't have much serious competition and social networks enjoy regional dominance.