Twitter

I chose to draw the line with Twitter, I don't have smartphone, and my impression of the site is that it is most useful if you tweet regularly, and probably is most intelligently used by someone who is promoting themselves or their organization. I can see it being very useful to the library in that it provides up to the minute information about programming. The drawback of this being that if the information is not up to date ( as is unfortunately the case with some of the twitter accounts linked !!) then it can be a bit dssapointing.
I can imagine if i was a politician on campaign, or a musician on tour, that providing supporters and fans with new information about my wearabouts and appearances might be very useful. As for myself, I am quite happy with my current level of busyness, and not particularily keen to add more.