Andriod is available in T-Mobile, but that is in US and UK. For Australia users, you can sign-up as Andriod Developer and buy a developer version for USD$399 with shipping cost.

Or I did a google search, there is a company , Kogan, claimed they will sell their Andriod Phone on Jan 2009.
http://www.kogan.com.au/shop/android-powered-kogan-agora-pro-mobile-phone/