its going to be on pc as well, so no its not exclusive. console exclusive yes, but not exclusive.
oh and did i mention IM SO EXCITED FOR THIS GAME!!!! :D FFXI pwns all mmo's so this is the same team, i cant wait to hear more!
EDIT: are people retarded? this is a ps3/pc game as of now (it will hit 360 sometime unless sony inked a deal) this game will sell just as much as FFXI did which is awesomesauce