Biracial/multiracial in Australia?

I was just wondering how common and accepted it is in Australia. What are the most common races and religions there also? And who are some popular biracial Australian entertainers and athletes? I'd like to know how places like the U.S. and Australia resemble or differ from each other in those terms. It seems the Aboriginal people and American Indians have a lot in common.

"how's a fella go about gettin' a holt of the police?" -Karl