I was looking at the Adelaide airport website as part of my roadtrip (Operation Wombat) planning and found a link that might be of use to you guys. It seems to list the WiFi hotspots in Australia. You can list them by State etc...
https://hotspot.internode.on.net/coverage/index.php
Thought it might come in handy if any of you travel interstate or something.
Regards
JAS