Ahoy, raise the main sail, maties! "Somewhere in the World," Volvo Car Corporation has sunk real-life treasure - a chest filled with $50,000s worth of gold doubloons plus a key to a brand new Volvo XC90 - and will soon be taking would-be pirates on a virtual high seas adventure to find it. Volvo's online treasure hunt, inspired by Pirates of the Caribbean: At World's End, starts May 4 simultaneous...