Did you know we pay more for the raw materials that go into the penny and nickle than their market value? Read this article from New Scientist which notes that we would not only save tax dollars by doing away with small coins but by making the dollar bill into a coin. Interesting quick read and seems to be something Congress may consider in trying to cut costs.
Starting over: Coining a new dollar - tech - 01 April 2011 - New Scientist