I'm not actually starting a social networking site, but I've always been curious about the hundreds, if not thousands that are out there - where did they get their first few thousand users? Obviously we all know the story of how Facebook started, and how their user base grew. Same applies for the story about Twitter and the big screens at South by Southwest (SXSW) festival, but what about all the others?
Has anyone here who's started a social network got any insight on this? As far as I can see, no users = no social network.