Not only is Oscar-winning director Davis Guggenheim (An Inconvenient Truth) directing commercials for none other than public persona #1 Barack Obama, but a whole slew of pop-docs are premiering at the Tribeca Film Fesival next month, with new films on Joseph Papp, musicians such as Queen and Tony Bennett, and sports figures such as the Red Sox's Tim Wakefield and the Met's R.A. Dickey.