URL = http://twitter.com/
"Twitter allows users to send and receive abbreviated communications or "digital shorthand" from a computer or mobile device. These are called "Tweets." The open-source nature of the application has spawned countless "mash-ups" where Twitter technology merges seamlessly with other open-source technologies such as Google Maps. Widgets and desktop applications such as Twitteroo and Twitterific take you outside of the browser and act as a sort of social instant messenger, sending and receiving rapid bursts of text and links."
(http://www.businessweek.com/innovate/content/apr2007/id20070409_372598_page_2.htm)