From Leo Laport: Buzz Kill.
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. All this time I’ve been pumping content into the void like some chatterbox Onan.
Thousands of tweets and countless Facebook status updates later, I am also coming to the same conclusion. Updates of life from the last two years have been mostly void. There wasn't even an easy way to backup my data from Facebook.