BusinessWeek - Scott Addison always knew he wanted to go overseas for his MBA. The 32-year-old American, who spent 10 years working in financial public relations in New York, was looking to add a global edge to his career, which U.S. schools couldn't provide. Now he's more than halfway through the year-long MBA course at Cass Business School in London. Before graduating, he'll travel to Poland, South Africa, and China to work with local businesses -- opportunities he says wouldn't have been possible if he'd stayed in the U.S. ...