kiwitrc: Offline Maps
I have got offline Maps working so you can pre load a map of an area and not have to have a data connection to use it. I used Mobile Atlas Creator to select and download the maps I wanted and the RMaps app on the phone. Youtube has a tutorial on using Mobile Atlas Creator (MAC).
Read the read me in the MAC downlaod as you need to drop a sql file into the MAC folder.
Bit of dicking around but it seems to work fine so far.
Which map source did you pick for New Zealand?