Australian devs can sell globally as the markets open up. I don't think the desire for picture frames is limited to his country.

I don't think you understand. To sell apps in Google's app store, you need a Google Checkout seller's account. To get a Google Checkout seller's account, well, we'll let Google speak for itself.

Supported locations for merchants

Currently, developers in the below countries may register as Google Checkout merchants and sell priced applications:

    * Austria
    * France
    * Germany
    * Italy
    * Japan
    * Netherlands
    * Spain
    * United Kingdom
    * United States

We're working hard to add more countries, but we're unable to provide any guidance on timelines. Please stay tuned!

This situation has not changed in more than a year, and you can't expect someone who wishes to base a business on developing Android apps to wait on that sort of time scale.

I was unaware of that, and would likely have remained unaware of it as long as developers outside those countries complained not about that very obvious and specific limitation but instead continued to make vague claims about "maturity" of markets.