A number of countries around the world are getting the standalone 250GB HDD for the Xbox 360. The UK being the latest example. As someone who has the 20GB launch console, I’m keen to see this available in Australia. I asked Xbox Australia about local availability and received the following response:
@techAU We don’t currently have anything to announce RE: 250GB HDD availability in Australia. If/when we do I’ll shout it loud! – jinx
The general trend internationally seems to be that the 250GB Xbox HDD will sell for the same price as the current 120GB model, which as Xbox fans know is pretty expensive. So until we hear different, the only way to get a 250GB HDD on your Xbox in Australia is to buy a special bundle.