Australia's NBN has has recent price announcements in recent days with a 300GB plan (comprised of 80GB peak and 220GB offpeak) priced at A$139. Converted to $NZ that's over $170 and represents extremely good value for money but probably nowhere near as low as many people think they want to pay for such a product.
FTTH isn't going to fix the data cap issue or the simple fact we have to bring in so much content from other parts of the world.
Exetel's utility style pricing plans for the AU NBN (FFTH) in Tasmania are (in $AUD) interesting:
25Mbit: $0 + $1 per GB / month
50Mbit: $15 + $1 per GB / month
100Mbit: $25 + $1 per GB / month
It's also worth noting that in AU almost no ISP's (apart from Telstra I think) include upload data in usage which is pretty signigicant imo.