Following in the footsteps of countless other couples whose unions were at one time chronicled by a reality show, Whitney Houston, citing "irreconcilable differences," has filed papers requesting a legal separation from Bobby Brown, her hubby of 14 years. Brown's lawyer was quick to spin the event as "a legal separation... not a divorce or a divorce petition." Houston has asked for custody of the couple's 13-year-old daughter, Bobbi Kristina, and that Brown be allowed visitation rights.... In happier news