Here's an interesting one: Swet, the Danish graffiti artist, started a project that would see him paint 100 graffiti pieces over 100 days. Sponsored by the German paint makers Molotow, he started December 1st 2009 and is now somewhere producing his 40th piece. You can follow his quest here.
From top to bottom: Swet, reversed (Day 1) 2009; Swet (Day 7) 2009; Swet (Day 30) 2009; Swet One (Day 35) 2010.
