Apple seems to be preparing to sell those unlocked online and in store from about... now.
NonprayingMantis: 16GB will be 649 USD. that is 788NZD. Th US price is exclusive of GST so by the time you add that on the NZD price is ~$900. that's about $150 cheaper than they sell for on the NZ Apple Store.
so a pretty decent saving if you are willing to forgo having any recourse to the CGA if stuff goes wrong.