Jell-O Pudding has launched a new billboard that’s powered by Twitter. It went up on Thursday and at the corner of West Broadway and Grand in New York City as a sort of interesting outdoor real-time response to the social web.

The way the billboard works is that it measures the mood of the world based on the number of smiley- and sad-face emoticons posted to Twitter. The twist is that whenever overall “smileyness” dips below 50 percent, the Jell-O gives out coupons to the randomly downcast.

Source: adweek.com