Although sales are down in the U.S., 2009 has been a blockbuster year for bikes in films. Manufacturers are hoping the product placements give them traction with new buyers. The summer movie season is here, in all its action-packed and, increasingly, motorcycle-enhanced glory. In just the last month, a pack of Ducati Hypermotards has streamed down the legs of a giant robot in "Terminator Salvation," a young Capt.