Well ... what can I say. Searching for "people in Zambia" using the Twitter search engine did at least get results that related to people in Zambia. However, when I used the 3rd party search engine Twitcity and put in Auckland, I got absolute babble.
At least I can say I have looked at Twitter, but I can't say I found out anything I didn't already have a pretty good idea about. I'm obviously getting way too old! However, I'm hoping that "Twitter and libraries" will change my mind.