Aussie is same DVD region as sensible game rating system New Zealand. L4D2 on the shopping list of Aussie weekend tourists coming over to see their cuzzies confirmed.
What y'all need to do is to lobby hard for the single border agreement to come in ASAP which will allow Aussie and NZ citizens to walk on through the international terminals as if it was a domestic flight (only scanning the passport to prove that you are an Aussie/Kiwi. Otherwise you could get nabbed by Customs on the way through and have those 12 copies of L4D2 in your suitcase confiscated.
If you try to import a banned game by international mail I'm sure you run the risk of having the game confiscated if Customs picks it up. And that'll be a waste of money.
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