http://www.pleaseenjoy.com/01Independent%20Projects/03Speech%20Bubbles/00BubbleIntro.htm The artist, Ji Lee, seems to be a Korean born (raised in Brazil). He printed 50,000 speech bubble stickers and placed them all over the NYC. He later came back and photographed what the passers-by wrote. The site seems a bit slow, but some of the comments are quite fun and interesting.