Janet March, who was married to Perry March when she disappeared in 1996, was officially declared dead last week. Janet's parentsLawrence and Carolyn Levineare no fools, and the action may well be one more step toward the possibility, however remote, of gaining custody of the grandchildren. (Perry and Janet had two children, who are now living in Mexico with their father, who has remarried.) A federal judge earlier ruled for Perry in a custody battle with his in-laws. That judgment was issued when the two children moved in with the Levines after being removed from Mexico. ♦ Shelby Sheffield, lawyer for the high-powered downtown firm of Waller Lansden, is scaling back her hours in the office to pursue her triathlon training. For years now, Sheffield has been burning it on both endsthe hours required for both her job and her training are intense. Sheffield is proving to be an athletic giant, placing first among amateurs recently in the extremely hilly St. Croix half Ironman triathlon (1.2-mile swim, 56-mile bike, 13.1-mile run). Because of her strong finish, she once again qualified for the Oct. 16 Hawaii Ironman (2.4-mile mile swim, 112-mile bike, marathon run). Very soon, Sheffield may well be Nashville's only resident pro triathlete. ♦ Word is that soon we might again be hearing the voice of Phil Valentine, the right-wing jock who most recently aired on WLAC. Author of Right from the Heart: The ABC's of Reality in America and a visceral opponent of a state income tax, Valentine may soon broadcast from WWTN. We were last listening to Valentine in December 2003, when he suddenly announced he was leaving. ♦ The short list for Nashville's next mayor includes Kevin Lavender, Buck Dozier, Howard Gentry, Chris Ferrell, Dewey Branstetter, Frank Garrison, Daron Hall, one of the Briley boys, Leo Waters, Dick Lodge and Gayle Ray. But it ain't until 2007.