Ozzy Osbourne, Tony Iommi, Geezer Butler and Bill Ward, the original lineup of heavy metal pioneers Black Sabbath, are reportedly reuniting for a tour and possibly a new studio album.  Considered by many as the most important band in heavy metal history, Black Sabbath's original lineup hasn't performed together since 2006.  The decision to get back together was reportedly made about two weeks ago, and Monday morning the four musicians met at a rehearsal studio to work on a live set, and begin working on new material to see if a new album can be hammered out.