I have found pockets of high-speed mobile data areas which are not documented and some which are documented but in unusual areas where there really wouldn't be expected coverage.
There is one on the coromandel peninsula vodafone umts and telecom evdo near pauanui, i was told a vodafone big wig has his holiday spot there. Currently i'm in maketu, just out from Te Puke and am getting telecom evdo coverage which noone knows about.
Whom knows about any other small undocumented spots of coverage, and who knows of econets coverage footprint?