In the poly community, or at least mine, OkCupid seems to be a fairly popular site that is viewed as "poly friendly".
Recently, OkCupid (or OKC as it is often referred to) was acquired by Match.com. See the links below for a couple of news stories on the whole thing.
PR Newswire: IAC's Match.com Acquires OkCupid
TechCrunch: IAC's Match.com Acquires Online Dating Site OkCupid for $50M In Cash
I've written about dating sites before, and will again, but I don't feel the sites are of much use. If I do a search on OKC with "poly" as a keyword I get exactly 11 matches within 25 miles of my location. Two of those matches I know fairly well, and two more at least casually. That leaves 7 possibilities, assuming I'm attracted to all of them and they reply to email. Which I'm not, and they don't. It isn't like I am in a small town either. I'm in a major metropolitan area. As you hopefully understand now, when I say OKC isn't of much use to me it isn't because their site or software don't work, it just doesn't provide me with a whole lot. At the same time, some of the "fluffy stuff" on the site like questions, surveys, or statistics can be somewhat entertaining. I also think OKC is easy to use and although I wouldn't call it "poly friendly", it doesn't specifically exclude alternative lifestyles either.
Despite all that, I do worry that Match.com will drive OKC to a paid member model instead of remaining free. Yeah, I know, right now they are saying things won't change and maybe they won't. But in my experience, they will.
Do you use OkCupid? If you do, what do you think of the site? Has it helped you find romance and relationships? Or is it just something fun to do at work when your boss isn't looking?