Hi Mathew -
My husband was a DV2011 winner. We live in Australia, but I was born in NZ, so he used my country of birth to enter (since he was born in Canada and they are unable to enter)...nice bit of irony there, is that he is also an Australian citizen who could only win using his wifes kiwi heritage, hehe...
Anyway, our case number is quite high for Oceania, so so far our experience has been a heap of initial excitement at actually winning, and then a great big long wait for our number to become current in the meantime....which should hopefully be around June/July.
You can read a lot about the experience in the 2011 DV Lottery Winners from Australia thread...it may not be NZ but surely pretty close? ;-)
Did you enter the DV2012??