I met Hubby, S2, and Guy (my first poly-relationship boyfriend, who's now just a friend) all through AdultFriendFinder. There apparently is an option on there to say you're interested in a polyamorous relationship, but in general, I find the site to be full of people who either don't understand what polyamory is, or choose to pretend they don't. So I wouldn't actually recommend that site if you're looking for a poly partner as opposed to just a sex partner, but I did have far better luck there than OKC or reality.