Since the link to the ABC as provided by IWT was written, we have had a change to an ultra right wing government who immediately scrapped the idea for a much, much cheaper (and much much slower) option of fibre to the node, and then the old, old copper wires for those living in metropolitan areas nwhilst we in rural areas are still waiting, and that paper was written in 2009!
So there is much more to your question for consideration and difficult mto reply without knowing all the factors.