Australian Google account owners have had access to rental movies since April this year, but buying wasn't an option. That has now changed, with to-buy options launching in Australia today (as well as Canada, the UK, France and Spain).
Both standard-definition and high-definition downloads are available. For new releases, SD costs $24.99, while HD is $29.99; older releases can be had for less.
No sign yet of Google Music for Aussies. However, that is rolling out in Europe on November 13, so we can hope that Google will eventually organise Australian licensing deals as well.