Did you see PG talking to the guys who were doing the 'matchmaking' dating site on this weekend's startup school? He told them that instead of making it into a dating site, find some really good matchmakers, treat them really nice, and reward them, and the masses of users will come later. I don't know how it applies, but if you're having a chicken/egg problem, try changing it around to an egg/chicken problem... Try turning the whole idea on it's head.