I don't see any new feature or change on the trading interface regarding different currency markets and in fact they have *removed* all reference to depositing via Australian dollars.
Yeah, this was confusing. It looks like the options shown for Add Funds are dependent on your selected wallet. I got an AUD wallet by swapping my main account currency to AUD, then back to USD. Then if you change to your AUD wallet via the dropdown next to your username the Technocash deposit method should be visible again.