Ultimate graffiti

If there's a message that you've just been itching to broadcast to the world in 500-foot-high, glowing letters projected onto a national landmark, you're in luck.

The Hello World Project will let you do just that during this week's United Nations World Summit on the Information Society.

Send a short message by Internet or SMS and you can have it projected on a major landmark in one of four cities around the globe: the UN headquarters in New York, a fountain in Geneva, a mountainside in Rio de Janeiro or a skyscraper in Bombay. Seven languages are supported.

The project's Web site says it's "an invitation to deliver a message, take a stand on an issue, make oneself heard. So expect funny messages, sharp comments, questions, love poems, messages with social or political content."

Wired News explains the fascinating backstory.