Celebrities using Twitter is all the rage right now.  Rightfully so, it gives them a hungry, always-on audience which they can control the message with.  Something a lot of them might not be used to these days.  Fan favorite, P.Diddy broke on to the Twitter-scene not too long ago in only a way Di...

You don’t need to reach everyone all the time. The beauty of fragmented media consumption means that omnipresence is important from the perspective of accessibility, not necessarily dominance, of a certain medium. A while ago, Robert Scoble mentioned he was doing a comparison of FriendFeed vs....