Originally Posted by Japhydog
To come as close as possible to what you want, you might consider buying a ticket to either BKK or CMB from Australia and originating/purchasing your xONEx there. That way you could travel in Asia, Europe, NA, then return home for awhile before returning ot Asia and starting a new xONEx.
Just buy a 12 month fare to BKK (B class on QF works well). It's about as flexible as you can get (apart from Y) but not the cheapest thing around. It's validity dates will fit nicely with the xONEx fare you are targetting. Alternatively, fly to SIN and get an AY AUD110 e-fare SIN-BKK.