FFXII is not playable online, me thinks there might be some sort of Online features though ( clueless )
Its being released for the PS2
Its arriving in Europe early next year, thats my guess, not official date has been said.
The Battle system is similier to MMORPG's, so I guess it was influenced alot by FFXI's battle system. FFXII's has an odd take on the ATB, but its there.