I remember an interview from a while ago and they basically said that the game was too difficult for them to port from PS2 to PS3 because of how different the technology was. They said it would have been like developing a whole new game which is why they decided to invest their time into actually developing a whole new game thus FFXIV came to be.
I remember that interview as well but kinda thought it was bs that they couldn't. The coding between a PS3 version and the Xbox 360 shouldn't be impossibly off. I find it hard to believe that they couldn't convert the Xbox 360 version or Pc to ps3. If it were that difficult then the whole concept of making the 360 version would have been "like developing a whole new game"

As much as I love the PS3 over the Xbox I have to say if you can port it to one next gen system it should be feasible to port it to another.

/vote +1 I'd like to see them add it to the ps3.