(AP) - She sat there in shock. Then, the tears started falling. Believe it or not, 17-year-old Melanie Oudin is the toast of the town at the US Open. Gritting her way through a shaky third set, the 70th-ranked player from Marietta, Ga., pulled off her second upset of the Open today, defeating a more-seasoned, more-famous, more-moneyed opponent—29th-seeded Maria Sharapova, 3-6, 6-4, 7-5. More»