Price differences that exist purely because we live in Australia suck, and the iTunes Store has some of the most prominent examples. MacStories has analysed the relative prices for iTunes songs and apps in different markets, and found that while Australia is badly treated, we're not quite the worst-treated customers in the world.
Using the average exchange rate for January as a basis, the site calculated the US dollar price for a song (Grenade by Bruno Mars) and an app (Angry Birds). On that basis, Australia is 69% more expensive for music (Switzerland is worse with 78%), while for apps prices are 30% higher (Japan is worse with 40%).
The price differences aren't as marked in the app store as with music, but they're still very much present. And while single-item prices don't tell the whole story -- different countries have different levels of disposable income, for instance -- there's still no logical reason why developers who set a global price for their apps shouldn't be able to set actual global prices. Hit the link for the full analysis.
The Great Disparity in Global iTunes Prices [MacStories]