Twitter, which was created by a 10-person startup in San Francisco called Obvious, is a heady mixture of messaging, social networking, "microblogging" and something called "presence," shorthand for the idea that people should enjoy an "always on" virtual omnipresence.
Super User
Many folks involved in social media are so ADD driven to the latest social network, they fail to fully explore and make use of the networks that they are already part of.