http://www.happykatie.com

Great Graffiti Hackers article in Wired magazine.  Gotta’ love those techi graff artists:

FLASHLIGHT BRIGADE

Who: PIPS:lab art collective
Where: Amsterdam
How:
Audience members are asked to draw using a variety of light sources: an
aerosol can rigged with a 3-volt bulb for producing skinny lines, a
battery pack attached to a handheld 12-volt lamp to make thicker
strokes, or a 220-volt spotlight for larger-than-life beams. A digital
camera set for a 30-second exposure captures the light trail. A brief
flash ends the shot, revealing the artist and capturing the scribbled
illustration. (Pablo Picasso did much the same thing for photographer
Gjon Mili in 1949.) Stills and video of the installation, called
Lumasolator, are displayed during the performance and uploaded onto the
group’s Web site.
Word: "Graffiti belongs to the
people, but not everybody is allowed to express themselves on the
streets," says PIPS:lab cofounder Keez Duyves.