Sorry I'm not sure if its on the PS3. You could try youtube and see if someone put it up there. The song is like 5 or so minutes long. Its just.. wow.. I think its the best score I have ever heard for a game.
One of my friends is working at the convention center right now. Sent me a photo of the show floor. Says he'll take more in a bit. Debating on wanting to be spoiled or refusing & waiting for the hype train.