'Lord of Rings' Supercomputer Turns to Commerce WELLINGTON, New Zealand (AP) -- A supercomputer used to generate the special effects for the "Lord of the Rings" movie trilogy is turning to commerce, offering its power to commercial customers worldwide, backers said Thursday.    Ranked 80th among the world's top 500 powerful computers, it can perform 2.8 trillion calculations per second, said Eric Pilon, a spokesman for the New Zealand Supercomputing Center...