Lonely Planet (www.lonelyplanet.com/australia) Destination information, hotel bookings, traveller forum and more.
Tourism Australia (www.australia.com) Main government tourism site with loads of visitor info.
Bureau of Meteorology (www.bom.gov.au) Nationwide weather forecasts and weather warnings.
Parks Australia (www.environment.gov.au/topics/national-parks) Get excited about Australia's cornucopia of national parks and reserves.
Go Camping Australia (www.gocampingaustralia.com) Beginners' guide to camping in Australia; includes detailed campsite reviews.