Judith Regan, the powerful editor at the center of the recent firestorm over O.J. Simpson’s pseudo-confessional book, has been fired from HarperCollins. “Ms. Regan’s publishing unit and its staff [will] continue as part of the HarperCollins General Books Group, but it is unknown whether that group would remain in Los Angeles, where Ms. Regan moved it from New York earlier this year.”