Have heard it is just the freighter bases in Aus, not pax.
I did hear a little while ago that subbing 777-300ER's onto some SYD and MEL services would allow the freighter to be pulled out of AUS, aside from the odd horse or racing car/bike charter. Then again it could have just been another case of a 777 pilot's wishful thinking - the "777's going to AUS" rumour seems to come up quite regularly whilst flying them I find!!