Think of how a fire engine's siren appears to change as the truck whizzes down the street. In less than two years, the SETI computers have together completed more than 570,000 years of calculations. The project has a loyal following. Scores of SETI clubs have formed around the world. It's highly competitive, with a Web site tracking the most productive individuals and groups.
Many users are astronomy buffs or have interests in science fiction.
They generally believe there is life in outer space, though many acknowledge it could take a few generations or longer to establish that as fact. Tell us what you think.