although I can transfer $$ into my account with them (from my Australian bank account to an Australian bank account held by them) I cant see any option to transfer $$ out to an Aussie bank account (only bitcoins).
There are a few individuals on the #bitcoin-otc marketplace who will buy bitcoins and send payment in AUD bank transfer:
Obviously you'ld want to use an escrow if the counterparty doesn't have a good trust history in the OTC WoT (Web of Trust)
There also was rumblings of some type of exchange. Have you chatted with others in #bitcoin-aus ? http://webchat.freenode.net/?channels=#bitcoin-aus