I think the order in who gets kh2 goes like this:
Japan - Already released
North America - Set for March 2006
Australia - Should get released around March or early April
New Zealand - Should get it a week after Australia
Europe - Gets it a month or so after Australia
This is all from research. This is usually the schedule for any PS2 game. The only exception is whether it is made in North America or Japan.
Don't take this as the proper release schedule, so don't get your hopes up. It's just an outline to what COULD be the schedule