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 (DanceGirl, 14; and PokéGirl, 11), two cats, one house, many projects.
My partner. 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).
Blog thread: A Mono's Journey Into Poly-Land (or, "Aw hell, there's no road map?!")
Slightly more polished blog with a mono/poly focus: From Baltic to Boardwalk