Nannygate and how a story is killed: A former nanny who worked for Don Imus has sued the radio and television personality, claiming he wrongfully fired her, chased her off his New Mexico ranch in the middle of the night and then trashed her on his radio show. Not a word about this since 12/1. Why? Because Imus has powerhouse lawyers, he has threatened to sue everyone, and has a track record of doing same. You can bet the Nanny got paid off big time and she deserves it. It's Imus's wife is the the main heavy in this.