The Laws of New Zealand (available on LexisNexisAu) is an encyclopaedic resource, and a good starting point for any NZ legal research. It is arranged by topic, and includes up to date commentary, legislation and cases on each topic.
Legal news feed from the Global Legal Monitor at the Library of Congress.
For information about New Zealand, see the following:
US Department of State Background Note (open access)
Australian Department of Foreign Affairs and Trade (DFAT) Country Briefs - New Zealand (open access)
Europa World Plus (UniMelb staff and students only)