Organizers of London�s 2012 Olympic Games launched a competition on July 25 to find a design-build team for its 80,000-seat main stadium, to be built east of the city. The Olympic Delivery Authority will prequalify up to six groups to bid under new European Union rules, aiming to award a contract by early next January. ODA is �seeking an integrated team that can combine design innovation with construction excellence,� says agency CEO David Higgins. He aims to have venues ready for testing at least a year before the games begin.