Also, the PS3 logo appeared at the end of the new trailer shown in the closed mega theatre at the Square Enix Party 07 (the trailer hasnt been publicly released).
And bringing it to the PS2 would be the dumbest thing to do in my opinion. I know they originally planned to release it on the PS2 (is this what you meant Arc_Master?), but that was before knowing when the PS3 would come out. There were never any plans to bring out on PS3 AND PS2.