In the cities you can find any kind of ethnic anything. Australia has a rich immigrant tradition, and so you can find some great restaurants. However, once you leave the urban oasis, it's a different story. It's a high-fat, high cholesterol, anglophile world out there, with overcooked vegetables on a steam table and lots of lamb. Prices for food are less than you'd expect to pay in the US, even without the exchange rate factored in.
Coffee is a different story.
Coming from Seattle, I was highly attuned to the local coffee culture. And there is one in Australia. The best thing is that Starbucks hasn't invaded the continent yet to drive the quality down. In the cities espresso machines are ubiquitous. In china cups too.