http://aphid.org/ipcollage ip collage, makes additive canvas image out of visitors' ip addresses, polling every 15s
project started may 2002, originally made static images using php's gdlib image funcitons.
recoded ~2009 for UCSC's 'Art of Collaboration' show. tweaked since.
see also: http://rhizome.org/editorial/2006/may/19/ip-collage/