Maybe Sony (SNE) will have the last laugh after all. These days on Amazon.com (AMZN), sales of discs in Sony’s Blu-ray format are trouncing rival HD DVD. A look at the rankings today shows that the bestselling HD DVD title – Happy Feet – is #129 in the DVD sales rankings. Five Blu-ray titles are outselling it: Casino Royale, Black Hawk Down, X-Men 3, The Departed, and Kingdom of Heaven.