MARRIED. Donald Trump, 47, publicity-addicted casino operator; and Marla maples, 30, occasional actress and mother of his two-month-old daughter Tiffany; in Manhattan. More than a thousand guests attended the 15-minute ceremony in the Grand Ballroom of Trump's Plaza Hotel, causing limolock in the surrounding streets. Among the invited: soap-opera villain Susan Lucci, fight promoter Don King, Wall Street raider Carl Icahn, ex-jock O.J. Simpson and Howard Stern. In their wake trailed 17 television-camera crews, 90 paparazzi and a small army of bodyguards. The newly minted Mrs. Trump topped her off- the-shoulder white satin dress with something borrowed: a $2 million tiara. | Discreetly overlooking years of lurid tabloid copy that preceded the event, the presiding Rev. Arthur Caliandro said of the couple, ''Their dream is true and innocent -- to find the closeness of two souls rightly mated.''