Today’s New York Times Science Times section has an article
A Species in a Second: Promise of DNA ‘Bar Codes’ with a good history of the DNA Barcode project and a nice graphic as well.

http://phe.rockefeller.edu/PDF_FILES/NYTimes_14Dec2004.pdf

http://phe.rockefeller.edu/PDF_FILES/NYTimes_14Dec2004_Graphic.pdf