Info downpour.

Via Smart Mobs:
Researchers are working on "information rain", taking advertisements to the realm of mock meteorology.

A projector on a tall tripod shows images of raindrops hitting the ground and making ripples, in hopes that people will enter the "rainy" area and hold out their palms.

A camera tracks the entrants' movements and sends the data to connected computers. Then the projector shoots out a round-shaped advertisement -- which can post words such as "SALE" -- right onto their hands.

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