gehenna:
Don't joke with the customs officials, they have no soul.
That's so true, I'd never thought about it before but the Australian Customs/AQIS staff tend to be very grumpy unlike the NZ Customs/MAF staff who are generally pretty friendly. I'm Australian and travel back there quite a bit, it's easiest to just not take any food with you (and if you do, no honey or fresh food, same rules as NZ), and if you live in a rural area or recently visited a farm make sure you scrub your shoes before you go.
If you're heading to Perth and want any info just PM me, I lived there for the first 25 years of my life :)