I've been promoting affiliate programs on my various blogs and websites over the years. Most of these are in-house Australian ones, or run through big affiliate networks with a strong presence in Australia (such as Clixgalore, Check My Stats, etc).
I joined Commission Junction a while ago -- which doesn't have an Aussie version (yet) -- because it's got a great reputation and lots of really good things to promote. I received my first payment from them in the mail today.
It was in Australian dollars, which was a bonus. That makes everything easier, since you don't have to pay for the currency exchange fee (which if I remember correctly is at least ten bucks per cheque) and you only have to wait three working days instead of twenty one for it to clear.
Other Australian affiliate marketers should check it out if they haven't already.