Seriously guys the hate in here is rather pathetic to say the least. Square obviously looked to Sony for help funding FFXIII and got nothing from them to help them make the best game they could. The only avenue left to fund the game at that point was for either Microsoft to have part funded the game or for them to have made the decision themselves that the extra revenue by going multiplatform would minimize the risk.
Stop being hypocritical with your criticism, Sony first and foremost are to blame for this supposed debacle that has happened, NOBODY else. I guess this point conveniently slipped your mind when you all saw the opportunity to jump on the hate 360 and SE wagon today.