Yes, there are several areas that are pretty well trafficked, not just by the people on the board here, but a lot of randoms depending on your area/ level. I'd say its easier to set up co-op through the board here though.
Welcome to Dark Souls, the message board.... --- GT: LoneReaper115 Official Chaos Composite Bow of the Dark Souls message board
It's pretty active still. If you ever want some nice fights/co-op it's a good idea to look here on the boards, or hop on the IRC to talk to some of us live. (http://www.gamefaqs.com/boards/608635-dark-souls/65339619) --- Yeah, I'm that idiot with the stupid signature. Fat-roll Kirk is the only true build. Official Longsword of the Dark Souls boards
If you ever need coop or something you can always just plan it out first on the boards and you usually get some takers if your level is appropriate --- Currently Playing: Dark Souls (just PvPing and Coop), XCOM Enemy Unknown Games on Deck : Dragon Age 1, Deus Ex, , FO:NV