What is everyone Tweeting about?

Is Twitter a Mental Vacuum?.  Good article on the relevance and importance of the (sometimes gibberish) that is taking place on Twitter.  Is only 27% of the information “useful”?  There’s an awful lot of talking about ourselves taking place… what you had for breakfast, where you’re  doing, where you’re going, etc…  We need a tool to separate the pearls from the rocks.