Quickest way to find the owner of an Australian .au domain name

The quickest way to find an Australian .au domain name owner is to use the recover password tool at http://www.ausregistry.com.au/tools/recover-password.
The AusRegistry.com.au recover password tool can also be used to help transfer Australian domain names between registrars.
Ausregistry.com.au also provides the raw list of domain which ‘drop’ each day http://www.ausregistry.com.au/tools/official-domain-name-drop or those domains which someone has forgotten to renew, which happens a lot, or genuinely no longer uses or wants the domain.