The PS3 is not going to outsell the Wii or 360 in Australia. The 40 GB model is $700 AU. While the standard (I'm pretty sure it's the 60G)B is $1000. The games are usually $120 AU. Way out of most people's price range. (I'm from Australia if you haven't already guessed)
The Wii is catching up to the 360 though, but sometimes it gets outsold by 360.