@sun @redneonglow @mangeurdenuage @ageha okcupid was worthless for me. Not a single reply to any of the messages I sent. My sister signed up, mostly just for shits and giggles, and started getting messages within hours of creating her account. I deleted mine soon after.
A coworker recommended plentyoffish, he actually met his wife on there. I only got two women to chat with me. (Since it was a free site, they didn't restrict off-site communication, so we exchanged AIM handles.) Neither went anywhere, though.