Seandew,
I would be shocked if they did not, at some point. There are too many wild cp to see there to not do one. It could be as soon as 2008, who knows?
The intent was to try and spread these out to as many continents as possible, but people have to volunteer to do one. I believe Australia is lumped into Autrail-Asia or hoever that is spelled/pronounced. they had one in Japan, so technically one in your area of the World already. However, there has been two in Europe and this is the third in the US. I am sure Fernando would love to see one in Brazil(not to mention the ICPS, as this continent has not hosted yet), but I don't know how many cpers there are down there and if they would help him.
I missed Atlanta(wife got a new job and I did not want to go alone), I made San Francisco, but have never been out of the country. We have always thought visiting Australia would be cool, so if it happens, that might be the non-US one I would go to.
Cheers,
Joe