Australian Studies Network : http://www.austudies.org/

The National Library of Australia’s website (http://www.nla.gov.au) gives information about all library services and provides links to other state libraries. Its catalogue can be used to search for books, films and videos.

Australia’s Cultural Network, "an online gateway to Australia’s cultural organisations, resources, activities and events" is available at http://www.acn.net.au/

MacquarieNet, "Australia’s leading online encyclopedia,"(http://www.macnet.mq.edu.au/) provides for A$ 49.95 a year easy access to: 
The Encyclopedia of Australian History
The Australians
Compton’s Encyclopedia
The Encyclopedia of Australian Natural History
Macquarie Net Art Gallery and Photo Library
The Macquarie Home Guide to Health and Medicine
AA News Service
and many other Australian and international reference works.

Cornell University (USA): http://www.orie.cornell.nedwards.australiana.html

National Centre for Australian Studies (Monash University): http://www.arts.monash.edu.au/ncas/ncashome.html

"Australia: A Reader’s Guide On-Line (ARGO): a guide to the best contemporary non-fiction books about Australia and available seminal works about Australia by Australians. It covers authoritative and accessible books about Australia": http://www.arts.monash.edu.au/ncas/multimedia/argo/index.html

See also: "Australian Places: A Gazetteer of Australian Cities, Towns and Suburbs" at :http://www.arts.monash.edu.au/ncas/multimedia/gazetteer/index.html