There are already server subforums filled with LFG/FC Recruitment threads, I don't see how this would be any different from those existing subforums. People will come to general discussion the most regardless because that's where all the action tends to happen and it gets the most dev responses as far as I've seen.

http://forum.square-enix.com/ffxiv/forums/669-Worlds%28Group-NA-EU%29