How's that for ignorance.
And it really doesn't take too much to check the Wikipedia page. But hey, I'll post the link for you.
http://en.wikipedia.org/wiki/Australia
Australia's original purpose was to house the convicts that were overfilling the English gaols. In 1901 we became a nation, free from England but still a part of the Commonwealth. The Queen is our head of state, but she really has no power (or has yet to excercise any, as far as I know).
Everyone is quick to jump on the 'descendents of convicts' arguement, but really, just because someone may have been related to a murderer 300 years ago, doesn't make them one now. Not only, but that relation would be very, very faint.
And disregarding your sarcasm, we actually do have quite a rich culture. Australia was born when most countries had already been founded and when Australia was discovered, it became a melting pot of nationalites. Plenty of English, Irish, Welsh, Scottish, Italian, Greek, Spanish, Chinese, Japanese (and others) peoples all came when Australia was founded. And while we mirror England and America in society, we are very much multi-cultural and have been so since federacy.
As an Australia, I honestly have no problem with the 'of America' part of JLA. It's something that was created 50 years ago [?] and the name has just stuck. Apart from the name, I personally, don't see the League as being very American. Alot of the superheroes are international and do their job world wide, as does the League. As long they don't try to impose the "greatness of America" on other countries, I've got no issue.
But really, they're just fictional characters.