$110 is about what I paid for Resi 4 Collectors Edition. $100 is about what I've been paying for everything else. Most of the games were coming out for $90 in recent times, with older titles being $50. Since Nintendo said that American prices for the games were going to be under $50, I'm sure we'll see them for around $80 - $90.
I completely agree with you on the marketing part. If they released adverts (for any console) over here, their sales would increase exponentially. I'm sure most Australians aren't too net-saavy, and they're Wii exposure is minimal. A few of those adds where everything is white, wouldn't be a bad thing for the Australian games market. I don't think we even see PC game ads over here. That's how little people think of Australia in terms of the profit we generate for them.