In the long term you'd have to think the AUDUSD will come off a bit. Our good run economically will slow eventually. Plus US elections coming up - that usually strengthens the USD too.
I saw predictions 4-5 months ago that the buck would surge, but then rebound - never again to see it's former glory. I was dubious back then, but the second phase seems to be playing out. Also I've read the following comment numerous times over the past few months "This is about Euro weakness, not dollar strength".
Also Gilliard's speech a few months ago telling business to "get used" to a stronger Dollar.
We'll see what happens over the next few months/years I guess.