This is awesome! Go Itawa! I hope they disband NCA and stary anew.
I've got some sales figures from the Sydney Morning helrald, form January this year:
PS2: 1 million
Xbox: 400, 000
Gamecube: 100, 000
So it's not quite as bad as some of you said, but it's pretty damn bad! The problem seems to be that the Xbox has taken the N64's place (Black, large controllers, 4 controller ports, a popular 4 player FPS)
Nintendo Australia is not as bad as sega is/was here though. They launced the Dreamcast, famous elsewhere for for being cheap, for $500, with only the 33K modem, which they wanted to charge you to upgrade. For a comparison, at the time N64 and PS1 were $180.
As for how the N64 did, it really seemed to do well, espescially among younger people. I'd say it had about 40% of the market, based on store shelf space.
One last thing, last generation Sony may have market share, but they really lost out a lot in Australia due to piracy. Pretty much everyone had their PS1 chipped here, and it's not for imports. In fact, regardless of age, I've not met anyone who gas a PS1 and no pirated games here. Some PS1 owning friends of mine have never owned a legitimate game.
This generation, it's Xbox that has the piracy problem. Console modding is very popular, and you don't even need to burn a disc, just copy to the hard drive (usually a 120 gig hard drive is installed when modding). I even know people who download entire xbox games, then transfer them to the xbox hard drive.