Twitter is not just for social.  Twitter’s biggest value is finding out what’s happening in your world in real time.  Co-founder Jack Dorsey describes it “as an information utility”, a personal news service as much as a social network.  Twitter messages are 140-character ‘tweets’ sent  to groups of followers.  With over 100 million active users, Twitter reportedly made about $140 million in revenue last year.  Twitter Co-founder Dorsey, said advertisers were proving willing to pay to promote their tweets, accounts and trends.  An expected market float could value the company at around $8 billion. – Reuters