There have been some rumor that the new Shin Megami Tensei series, Persona 5 will be released on PS3, although it is still a rumor, it will be a HUGE game when it is released. Read more about it here.... Shin Megami Tensei : Persona 5 - Rumored Title
The PS2 is about finished and as much as I'd love to see this on the 360 I just don't see it happening unfortunately. Hopefully I'll have a PS3 by the time this comes out though.
Knowing how sony loves milking thier customers, I think they might somehow have a ps2 AND a ps3 version XD
They do that for first party games(double consoling-LBP,MotorStorm). I dont think it will happen this time...