Twitter is easy to mock, but I suggest you compile a list of your favorite thought leaders on twitter, then have the list emailed to you via a service like tweetymail.

Then you'll start to get a glimpse of how potent twitter can be.

Who is mocking? I use Twitter regularly. But I'm not the one claiming that it's the greatest source of wisdom and knowledge on the planet. It's an interesting and useful form of media, but it's not even clear whether there's a viable business model in there.