Square Enix has announced that Final Fantasy XIII will be released on the PlayStation 3 in Japan sometime during the 2009 calendar year.
Currently, Square Enix is developing the Japanese version first, which will be a PS3 exclusive in Japan. Then once completed, Square Enix will port the game to the Xbox 360 and localize the PS3 version for North America and Europe. Depending on languages and other conditions, it may not release in US and Europe simultaneously like previously promised.
Keep your fingers crossed that Square Enix will deliver the US and EU versions before the end of 2009 as well.