I've contacted Chorus via B4Udig and they do have a cable along the street in front of the house, however their plan doesn't say what it is. I've phoned them and the person on their end simply regurgitated what I already saw for myself at http://www.chorus.co.nz/maps which indicates no fibre.
I also called the council and they said anything blue is water, and that telecoms is green. I can't see the previous owner confusing blue cable compared with a mains water supply, nor can I see why a new water supply would be laid beside a road that has already had it for decades.
I also see here http://www.stuff.co.nz/auckland/local-news/rodney-times/8958611/Fibre-optic-cable-en-route a blue fibre-optic cable being laid.
Wondering if anyone has any theories as to what this blue cable might be, and how I could go about finding out what it is. Perhaps I should just dig it up and break it, and see who comes knocking :D
Please tell me its fibre :D