Expat.com is a worldwide directory of blogs related to expatriate life, with listings for New Zealand.
How to Move to New Zealand provides practical advice from a couple who went through the process and documented it in their blog.
Working in New Zealand.com provides a lot of information for those interested in working and living in New Zealand.
Welcome to New Zealand is New Zealand's official tourism website.
Lonely Planet Worldguide provides a lot of useful travel information, with a section on New Zealand.
Rough Guides Destinations offers a lot of useful travel advice and information for most countries, with a section on New Zealand.