New York Daily News - http://www.nydailynews.com Wicked wipeout on 'Letterman' By KERRY BURKE and BILL HUTCHINSON DAILY NEWS STAFF WRITERS Friday, February 6th, 2004 A soaring stunt on "The Late Show with David Letterman" turned into a horror show yesterday when a champion snowboarder wiped out and fell from a ramp nearly two stories high. The audience at the Ed Sullivan Theater gasped in disbelief as Tara Dakides slipped and plummeted 15 feet to the pavement on W. 53rd St., opening a cut on the back of her head. Dakides, who was not wearing a helmet or pads, was rushed...