"After a run-up in metal prices, the U.S. Mint announces that its cost for producing a penny has risen to 1.73 cents, while that for a nickel has grown to 8.34 cents.
In addition to costing American taxpayers more than $100 million a year, the imbalance also forces the federal government to enact new regulations prohibiting the melting of coins to extract their intrinsic value."
http://money.cnn.com/galleries/2007/biz2/0701/gallery.101dumbest_2007/85.html