NetStumbler around Wellington
Computerworld's brief story about CityLink's wireless network's apparent success (despite my repeated grumblings about the high per megabyte pricing) reminds me of one good thing one can do if bored in the back of a motorcar or bus going through some part of central Wellington: chugging along a street on one's way home with a working installation of NetStumbler or MiniStumbler to see how many people secure up their wireless access points properly.
That's not to say I'm the first person to think of this. In any case, the largest proportion of unsecured access points I've found tend to be CityLink's public prepaid ones.