Sit for your own Australian citizenship test here. These sample questions will give you an idea of whether you'd make a good Australian or not. You need 60% to pass. I got 19/20. I missed one point because I got the number of Australian states wrong. Boo.
Some questions of particular interest - "Australia's values are based on the ...", to which the correct answer is "The Judeo-Christian tradition". I'm an atheist and I happen to think that I make quite a good Australian. Another good one is "Australia's political system is a ...". The options include "dictatorship", "socialist state" and "monarchy". My favourite was "which animals are on the Australian Coat of Arms?", to which one of the incorrect options was "Lion and unicorn". I wonder how many people fell for that one.