Yes PVP will be added to game sometime Jan/Feb 04 by way of country vs country.
I guess the 3 countries will be at war with each other in certain points of game and players will fight for their country against other players from other warring country.

But you can't just attack anyone you like. Squaresoft is not dumb like Sony to make game stupid like Everquest. Everquest really stinked because you couldn't enjoy game always watching back from fellow players and NPC enemies.

So Square won't make game suck with PVP. But will put PVP in storyline of game and make it work.