Twitter is email with three technically trivial but socially significant differences: - messages are public by default (every account is a mailing list) - all

Twitter is email with three technically trivial but socially significant differences: - messages are public by default (every account is a mailing list) - all messages go through a single server (Twitter can mine all the messages for interesting data) - messages have no body, only a 140 char 'title' (no pressure on users to think of something worthwhile to say)