You might call it “Son of the Netflix Prize.” The DVD rental company has not yet announced a winner for its first US$1 million challenge to improve its system of recommending movies that subscribers may enjoy, but it is already indicating there will be a sequel. In a post on the Web forum set up for the current Netflix prize, Netflix’s chief product officer, Neil Hunt, said Netflix will announce specific details of a second contest in late September, when it divulges the winner of the first one.