I asked my 17-year-old grandson what he knew about twitter -- his response
"Regarding twitter. I have never used it, and am not at all a fan; I
think its kinda useless. But, as i understand it, twitter allows you
to publish short (140 character) messages that describe your current
status. Additionally, you can send new statuses (stati?) from your
cell phone by text message so as to update your twitter even when not
at a computer. The idea, then, would be that while doing various
activities you could broadcast to your friends your updates. I also
understand that their is a subscribe feature, so that whenever
somebody changes their status, you can choose to receive a text
message to your phone about it. I personally don't feel that it is
very useful because i don't know how much i wish to get constant
updates on my friends lives. Additionally, it has been parodied
several times recently in newspapers and online."