Me? Not yet, but I do have one I'm working on, a character from a novel I'm working on, and I've been bugging myself to make his giant organ-arm thing that attaches to his back. Just for the challenge. Some just look too similar to existing things to really work well as OCs, but some that have something that sets them apart- like a giant prop or a very detailed costume- that's something that will make me interested in talking to you about your character. If you're just in plainclothes but an OC, not many will notice. If at all.
My friend and I have considered putting together a group for a webcomic my friend is working on, as a strange publicity thing, but we shelved that for now, it seems somewhat low...