Why do people use Twitter?

Couple of videos in which Twitter users are asked why they use Twitter.

Thanks to Hans for bringing this one to my attention.

Twitter – why it’s here and what to do about it Introduction What is Twitter? It’s a world-wide phenomenon that lets...
Twitter – Conversation or Broadcast Platform? There’s much rhetoric about Twitter being a gigantic conversation, a...
Twitter growth hits the skids It seems that the growth in visitors to Twitter has...
Twitter backgrounds: A rough layout guide Tweet Here’s how I layout a Twitter background. It gives...
Scoble on Twitter When tech guru Robert Scoble says something’s hot, you can...

Why do people use Twitter? / we are social