I second Fanpass - when I used it to watch the cricket over the summer it was excellent. At $15 a one-day pass will save you a lot of mucking around. Rugbypass will work if you have a DNS unblocker or a VPN. You won't find an overseas provider streaming unblocked into New Zealand because Sky have exclusive rights. If you don't mind an hour delay, it'll be free on Prime at 8.30pm.
I also feel the NZ commentary adds a lot of value
Not if the commentator is Justin Marshall :P
Thankfully, there is a team. If it wasn't Marshall then someone else would be the weakest link in that team.