Puckhead,

In regards to getting to NZ, I don't know of any pax airlines that'll let you jumpseat down there. You could try the cargo forum and see if any of the freight boys have any insight into it. I've always used the Zedfare on Qantas out of LAX which runs about $230 roundtrip (sorry Koru). AIRNZ was about $500-$600 last time I checked due to them only offering an ID90. They're nicer to ride on, but if you want to get there cheap, use QF. I've done it a number of times now and haven't had any problem getting there or back. Been tight a few times but still got on. Was given first class once but had to ride cattle the others. Beggars can't be choosers right..........
Let me know if you intend to use the zedfare on QF and I'll do my best to make the process as painless as possible for you, i.e. what terminal, how it works etc. Little different from riding domestically in the states. Hope this helps.