jamesrt:Geektastic: Unless your account is with Audible in Australia
This may well be because of Lawyers rather than technology.
Australia [as far as I know] has different publishing rights; and it gets 'complicated'.
I've noticed in the past that books my one of my favorite authors are not made available in Australia [I'm talking in (e)book format, not audio] for as long as 18 months after the initial US/UK releases - as a different publisher [or branch office, or whatever] has AU rights, and they clearly have a different agenda with respect to time-frames.
I wouldn't be surprised if a similar condition exists for audio books too.
It's possible, however it is not stated anywhere in the Kindle "supports Audible" advertising for example (or if it is, it is buried in the obscure smallprint no one reads).
The end result was cancelling my Australian account and opening a US account.