I see in the weekend press the U.S. is removing them all and the TSA wants 40 million $'s back from the vendor.
They are NOT removing "them all!" Don't misread the press - The US is only removing the cancer-causing backscatter X-ray machines (Rapiscan), which were only a minority of machines anyway. The majority of machines in the US are the millimeter wave (L3 ProVision) which are the ones Australia is getting. In the US, all of the x-ray machines are being replaced by millimeter wave. In fact, even more millimeter wave machines are being purchased, expanding the full body scanner program even further!
Also, the L3 machines in the US have the software that only displays a stick-figure outline instead of the detailed nude image. I would expect Australia will use this too though it hasn't been confirmed.