As what appears to be the normal thing with these large companies is they advertise products that they don't have for quite a few months before the release.
I can only guess that there trying to gauge the reaction to these products and to what level of stock they are going to keep .
Of coarse as Australia is only a tiny market we are down the list on the back orders I suppose.
I have been waiting for my Celestron 80mm Ed for about 2 months now . There are only a few reports of people getting them on CN still , So you knows >