The picture shown here is a photograph of Irish moss taken by Andrea Ottesen. I selected this image because it was taken with a 7-megapixel point and shoot camera. Felice Frankel, one of the judges, is quoted in the article saying, "We shouldn't forget that we don't need [complex equipment and techniques] to create beautiful representations."
[Just before I was about to post this I found a link and description of the challenge by David Warlick on his blog 2¢ Worth. Another cool picture. More links.]
[Image: Ottesen, Andrea. "2007 visualization Challenge Winners." Science. 28 Sept 2007. Science Magazine. 2 Oct 2007