Chops has had varying degrees of success with OKC. He's on some of the Facebook poly groups, but I think they're not his cup of tea, as many of the groups on FB tend to be a bit "meat markety".
He's also used meetup.com to find a local poly discussion group he enjoys - less focus on dating and more focus on talking.
Your mileage may vary - I think Xena enjoys the FB-based local meetup groups more than Chops does.
As I'm mono in a poly world, I get intimidated by the in-person poly groups. Instead, I pretty much go online to relate to other folks in poly relationships (here, and the Yahoo mailing lists for mono/poly relationships).
Mono. Divorced, two kids, two cats, one house with many projects.
My partner of ~3 years. Poly. In relationships with me, Xena, and Noa.
Poly. In relationships with Chops and Noa, and dating others.
Married, Poly. In relationships with Chops and Xena (individually).
My navel-gazing blog thread: A Mono's Journey Into Poly-Land (or, "Aw hell, there's no road map?!")
My slightly more polished blog (external): From Baltic to Boardwalk