Michelle Rhee has been everywhere that education is discussed for the past few months. Oprah declared her a "warrior woman." She appeared on the cover of Newsweek magazine, holding a broom, presumably to sweep the trash out of our classrooms. Her trajectory faltered a bit when the mayor who appointed her chancellor of schools in Washington, DC, was defeated -- and many voters cited Rhee as one of their reasons for their choice. But two weeks ago she launched her latest venture, a website that ai...