I've had lots of ideas for dating sites: setting up group outings like ad hoc speed dating, a rating mechanism for actual dates, a virtual currency system where

I've had lots of ideas for dating sites: setting up group outings like ad hoc speed dating, a rating mechanism for actual dates, a virtual currency system where you could "buy" access to deeper levels of people's profiles, and many more. The problem is always the chicken/egg question. How do I get a sizable membership to the site. The only answer I see is piggybacking onto a social network like Facebook.