decent, independent statistics for New Zealand internet users?

Does anyone know whether there is anyone producing decent statistics of New Zealand internet users? I'm aware that the area is fraught, I'm really just looking for an analysis from someone that can at least spell "vested interest" and "self-selected sample." Ideally the statistics would include things like: 1) OS / browser used 2) bandwidth of connection 3) use of English/Maori and/or ethnicity 4) social networking sites used The best I've found so far is: http://www.aut.ac.nz/research/research-institutes/icdc/projects/world-intern... which has good coverage of (2) and the ethnicity aspects of (3). I've also got our own google analytics stats with >a million "unique users", but this these seem to be pretty much contaminated by the fact that _lots_ of our users access our site from school. cheers stuart
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Stuart A. Yeates