The process was fairly easy yesterday for Melbourne and Adelaide, only a couple of hiccups. If you haven't gotten tickets yet and plan to, keep another CC on hand during the purchase process in case your bank declines the purchase. Mine did because I had first purchased tickets from Ticketmaster for Melbourne and then tried through Ticketek to purchase for Adelaide. Apparently on the 2nd purchase the bank was afraid it was fraud seeing as how it was two international purchases so I had to enter another credit card number for the 2nd purchase and then dealt with my bank after I had the Adelaide purchase squared away.
Also, when dealing with Ticketmaster, if you are purchasing from another country, you must click on the "other Country" box to complete the e-tickets purchase. It's in the upper left corner of the purchase page. And also know your international phone code because you will have to enter the complete number where they are to send your e-ticket. If coming from the US, it's +1 and then your 10 digit cell number.
On another note, does anyone know the price of RZ for Melbourne and Sydney?