Is this what you were after?
This was loaded early hours of this morning about 3am
No. I had looked at that. I found the link on http://www.vodafone.co.nz/mobile-data/3g-broadband-plans.jsp very carefully styled to look like all the other text on the page instead of a link.
What I'm looking for is something like the fine print bits on the 3G broadband page that says:
I can't find anywhere on the site that says what size blocks you'll be charged in on the casual plan (seeing as the 10 KB block bit specifically says monthly plans), and I can't find what rate you'll be charged at if you use less than $1 worth, even though it says "we'll only charge for what you used" (at least, I assume it's meant to say "we'll" instead of "well").