WebProNews reached out to both Teachbook and Facebook for comment on the suit the latter has filed against the former. So far, we've only heard back from Teachbook. In case you're not familiar with the story, Facebook is suing a company called Teachbook, which operates a social networking site for teachers, apparently because it has "book" in its name and "competes" with Facebook. Teachbook is described as "a professional community for teachers".