Local members of the Otago branch of the New Zealand Society of Genealogists have recently celebrated the completion of nine years of data entry adding the Otago Police Gazettes to the Otago Nominal Index. The latter was started 21 years ago with the indexing of early local street directories and electoral rolls, all of which is still continuing. The index now contains approximately 400,000 names, and the group is now embarking on indexing the Mackays Otago Almanac.
This is an amazing source for genealogical and historical research. Take a look at it at http://marvin.otago.ac.nz/oni/ where it is hosted by the University of Otago Library.