How is Twitter useful?

• Getting the most out of Twitter – N.Y. Times By CLAIRE CAIN MILLER March 3, 2010 – “The truth is, you don’t have to post a message to get the most out of Twitter.”
  • A CUSTOM NEWS FEED
  • CHECK YOUR LISTS
  • ATTEND A CONFERENCE, VIRTUALLY
  • WHAT’S AROUND YOU RIGHT NOW
  • ASK QUESTIONS
• http://ulvlibrary.wordpress.com/2010/01/20/how-are-you-using-twitter-in-classes/
• http://arstechnica.com/business/news/2010/02/collaboration-20-twitter-team-ups-for-fun-and-profit.ars

Please add your own experiences or other examples.