Harper Voyager, publisher of authors like George R.R. Martin, has opened its doors to unsolicited manuscripts. You can submit as many as you like but they need to be finished. They are looking for speculative fiction for adults or YA only. The doors are open from 1 October through 14 October, 2012. Accepted manuscripts will be published as eBooks.
I know, it's short notice but if you've got something ready and feel like trying the traditional route, go ahead. Good luck,
P.S.: I might try, but I'm not sure. After all, I won't be able to publish some stories before January anyway, and they said they'd read all submissions till then. Hmmmmm