http://blog.makezine.com/archive/2006/03/interactive_kinetic_sculp.html This explains how an interactive sculpture works.
http://www.theunseenvideo.com/ This music video reads in the weather for your area and generates its music video based on it.
http://www.dpchallenge.com/image.php?IMAGE_ID=281896 A cool picture of balloons rising out of the fog.
http://ejectionseat.com.ne.kr/emain.htm A program which lets you simulate the ejection seats in fighter jets.