really?
you're being a little disingenuous here...apple is a company that is fairly good in terms of keeping forex differences low, given their relatively short and constrained product lifecycles. for example you're including the tax difference--in AU prices are shown inclusive of GST, whereas in the US its all excluding tax. That's 10% straight off the bat. Then you're assuming that their is just one exchange rate...what you'll need to use is what the bank is selling notes for (not what they're buying!)...as of today that's only 1.03 USD to 1 AUD so there's another few points. finally you're making the assumption that supply chain and sales channel costs in a country as small as Australia is the same as in the US.
By my calculation, there's only a $13 difference on the 8GB iPod Touch or ~6%...