SARATOGA SPRINGS, NY -- It sounds a little like a fairy tale. A fire-breathing creature descending on several unsuspecting ladies in search of a prized acorn. In this story, however, the role of the fearsome creature is played by GI Kentucky Oaks heroine Thorpedo Anna (Fast Anna), who while not grotesque, gives eight other GI Acorn S. rivals cause for concern nonetheless. "The boys are lucky she is not running," said trainer Kenny McPeek with a chuckle. "I mean she's good." After an emphatic win at Keeneland last October, she...