clipped from: www.wired.com   
Txt of the Living Dead is projected on a screen in France, complete with text-messaged speech balloons.
An American mashup artist let passers-by put words in giant zombies' mouths last week.

The show, called Txt of the Living Dead, projected 15-foot-wide, black-and-white stills from George A. Romero's classic 1968 horror flick Night of the Living Dead onto buildings. Text messages from random people on the street then filled comics-style speech balloons that were added to the images in what New York artist Paul Notzold called an "SMS-enabled interactive street performance."

"It's all uncensored, and that's the beauty of it," said Notzold, a 33-year-old art director who also teaches about cell phones at Parsons The New School for Design.
It's a transient, high-tech form of graffiti.

Notzold's work is one of several public art projects, like Smoke Signals and the Helloworld Project, that encourage viewers to become participants.

Check his website for details.