XB360INFO.com has an article suggesting that March 2 2006 will be Australia's 'green circle' day. Yay. Prices are also quoted, $50 more than I predicted here, but as I feared, the exchange rate hasn't been our friend recently, and Microsoft will be hedging I guess.
The fairly early launch is very pleasant, considering I was reading an article on IGN recently where Microsoft couldn't commit to any quarter (!) of 2006.