Yup....finally gave in.
After going to a con, it starts to make sense. Most cons tweet announcements and changes during the event. It's also a handy way to keep in touch with people you'd rather not give your phone number or Skype to. Plus most small cities use it to keep people apprized of road closings in the event of accidents, there are also services that use it to communicate updates or emergency downtime.
Link
FeyPhoenix
I still don't get the point of twitter myself xD