2 More links on the theme of "The Medium is the Message".
http://scottgundersen.tumblr.com/ - Who produces art out of old wine corks. I knew there was a reason I was saving my corks.
And there's this video on Vimeo in which artist Ashley Hackshaw creates a portrait of Frida Kahlo out of buttons - time laspe photography shows how she did it. I've seen better, but it's good to watch the process.