That's a pretty narrow view of Twitter. He doesn't use the word "search" once. If you are not using Twitter search on specific key terms then you are not using Twitter effectively.<p>He doesn't mention hashtags. A great example is back channel discussion for an event, meetup, or conference. For example, you should be following the #leanstartup hashtag.<p>He doesn't mention breaking news. I heard about the Chinese earthquake, Iran revolution, and Michael Jackson's death on Twitter.<p>RescueTime says I spent 2 hours in Tweetie last week. I easily derive value out of that time. (A chunk of that time was following the #Canucks hashtag while watching hockey.)