I’ve been a fan of Hektor, a portable Spray-paint Output Device for laptop computers, for years now. I’m not going to explain how it works and what it does, just check the website. Hektor just had an exhibition at Riviera in Brooklyn, New York, and they now sell prints for $150. You can see some picture of the exhibition at flickr.
I’m still waiting for some advertising campaign to pick up this ‘technology’ … . Or does anyone have an example? And no, ‘Bikes Against Bush‘ doesn’t count.