A little deeper investigation showed that nothing I had posted on Buzz had gone public since August 6. Nothing. [...] No one noticed. Not even me. It makes me feel like everything I’ve posted over the past four years on Twitter, Jaiku, Friendfeed, Plurk, Pownce, and, yes, Google Buzz, has been an immense waste of time. I was shouting into a vast echo chamber where no one could hear me because they were too busy shouting themselves.