Most Australian photographers have seen the 4020 page, which details very neatly what you can and cannot do with your camera in Australia.
Recently though I found some sites, like this Street Photographer's Rights page over on artslaw.com.au. Another good Artslaw article deals specifically with photography and the internet.
There's also a really great entry by a Sydney Morning Herald photographer which has a lot of detail about the laws, the ethics, and some good links.
The Australasian Legal Information Institute has a very detailed analysis of Australian law re: photography