Australian's can now sleep easy knowing that their Marketplace purchases will no longer be messed up by un-necessary fees. If you recall, through billing errors some Australian Windows Phone users were charged an International Transaction Fee (101% of purchase) on top of the cost of the Marketplace app.
The root of this problem was where the billing was being processed (Singapore) that didn't recognize Marketplace charges as a local purchase. So that $.99 game began to cost Australians $1.99.
To avoid this issue from re-surfacing, Microsoft has established a transaction processing center in Sydney. So to our friends down under, you can now make your Marketplace purchase with confidence that a local purchase will be processed as a local purchase.