There is a well-written web page dealing with, and thoroughly refuting, the poorly defined theory of Intelligent Design:
http://stardestroyer.net/Creationism/Essays/IntelligentDesign.shtmlThis essay bases its criticism on the design of life: by all accepted standards, the fragile, interdependant, jury-rigged design of our bodies is not something any sane person would attribute to an
intelligent designer.
The Intelligent Design meme is a particularly infectious one for two reasons that I can see. First, people are already inclined to accept it due to religion and lack of knowledge about evolution. Second, it is not well defined, with parts of it resting on unfalsifiable claims.