I highly doubt the PS3 version will be out before Christmas. My original hopes were 1st quarter of 2012, but even that is starting to look pretty far-fetched. I'm going to go with by the end of next year, that way I will be very pleased if it comes out earlier.
I hope that it does come out ASAP. I have several friends with PS3s just dying to play, but they don't want to fork out the cash to build a PC that can run the game.