World Wide release on 11/Nov/2011 GMT. heres a list of times at which the game would be able to buy/install: New Zealand would get the game at 12noon 11/NOV/2011. East Coast Australia 10am 11/11/11. East Cost USA (new york) would get the game at 8pm 10/11/2011. West Cost USA ( LA) would get it at 5pm on the 10/11/2011.
World Wide release dates for Digital distrubtion makes sense, cuts down on complaints about not being able to play a game even though its been released, and also it helps to slow down piracy. Belive it or not, having seprated release dates for different regions does affect how much a title will be pirated. Ask russian developer GSC the makers of the STALKER series about what happened when the last game was rleased in only russia and held back for a 5 months from the rest of the world.
Oh and one more thing. TO Zenimax media: STOP PRICE GOUGING AUSTRALIAN CUSTOMERS JUST BECAUSE THE AUSTRALIAN DOLLAR IS JUST A TAD ABOVE PARITY TO THE US DOLLAR.