Serious answer: I would allow connections to current social networks. Maybe even bill it as an aggregator of sorts, so you can pull in (just for display purpose

Serious answer: I would allow connections to current social networks. Maybe even bill it as an aggregator of sorts, so you can pull in (just for display purposes) as much data from linked social networks as possible. Give people a real reason to use your app without making them sacrifice the connections they've already made.