well gt5 prologue is coming out soon.. im not exactly sure when but it should be in the first half of this year.... as for the actual full gt5 game... ehh... late 08... maybe... probably 09
i heard spring/summer 08 imgiddy like a little school-girl in anticipation
GT5 prologue is already out in japan, We're not getting it. You can import it from playAsia for $40