I was looking for some specific material on “Kiwi English’, as I have a couple of students who intend to travel to New Zealand in the near future. So, I found this nice glossary of Kiwi English & Phrases.
At BackpackerBoard, an interactive guide to backpacking in New Zealand, there is an interesting topic in the forum section that is about New Zealand Lingo, too. It is quite interesting because you will be able to read about the expressions and what people think about them.
In this link you can find lots of information about NZ, like a map of the country, geography and weather, population, government and others. And there is also the Radio New Zealand, for those who want to get used to the Kiwi accent.