Sorry it took me so long....
All I can find is November '08 which is so not specific
and you know how it is with SE they never stick to their schedules (ZOMG MUST FINISH FFXIII NAO!!!) so this might be quite optimistic. Depressing really, I've also just got into the KH world and wouldn't mind seeing a PS3 KH game myself. I even heard that KH3 is going to be some sort of prequel, which will blow my mind
But unfortunately that's all I can find out, without swallowing my pride and going to KH3 forums to find answers ¬_¬ hopefully someone else has more info?