They keep saying interactive TV is coming soon -- but does anybody really know what that means? Eon, a company in Reston, Va., that is one of a number of start-ups in the field, says that after more than six years of development, it will within months be ready to launch its interactive box in test cities. One company Eon is working with is PBS, the Public Broadcasting System. And what, according to an Eon spokesperson, is one of PBS's possible uses for the technology? You guessed it: interactive fund-raising events.

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