I thought I would start this blog by touching on the hottest current Social Media application – Twitter. Everyone has heard about Twitter, but what exactly is it?

Twitter.com describes the tool as a "service for friends, family, and co–workers to communicate and stay connected through the exchange of quick, frequent answers to one simple question: What are you doing?” Sounds easy enough… but in reality, the Twitter phenomenon is far from a simple definition.

In my mind, a model (here on Flickr) made by Raimo van der Klein, best classifies Twitter: Twitter is microblogging: high frequency public (one2many) messaging

A weblog: low-frequency public (one2many) messaging

SMS: low-frequency private (one2one) messaging

MrTweet says that "Everyone has different uses and purposes for Twitter".

How do you define or use Twitter?