What people will be talking about on Twitter, Facebook, Google Plus, and LinkedIn? Bernardo Huberman, director of HP Labs Social Computing Resarch Group, claims to have created a formula to predict people's behavior tendencies on social networks. The physicist introduced the formulas in a lecture in the Pontifical Catholic University of Rio Grande do Sul, in Porto Alegre, Brazil. One of his main tools is Twitter. According to Huberman, the level of attention a subject gains at the microblog determines how much it would spread and how big the revenue can be