I'll post everything I remember hearing. If I'm wrong, someone please say so.

It's an action RPG.

It involves network play.

It involves the Turks and their hunt for Aeris.

You use the phone's built in camera to take pictures of things which get you different kinds of materia. For example, if your picture is mostly white, you'll get cure materia.

Other than that..... The game is Japan only, good luck tracking down info.