The University of Sydney's page on Archaeoastronomy and Ethnoastronomy - includes general links to information specific to Australia and other World regions:
World and Cultural Regions
Australian Aboriginal Astronomy:
The Aboriginal Astronomy Project - Macquarie University Sydney - Quite a good blog with information on a range of topics, including the impact crater at Wolf Creek and Aboriginal myths regarding it's origins.
Ray Norris' site Emu Dreaming which includes Barnaby Norris' wonderful photograph of the Emu in the Sky (formed by the dust clouds of the Milky Way) as it appears above an Aboriginal rock engraving of the emu.