Someone posted a rant on Craigslist, the gist of which is that we ought to get rid of pennies. He or she is right. Pennies have so little value with today's inflated dollar that it makes a great deal of sense to round prices off to the nearest nickel, as is done in Australia.
There used to be an organization called the Coin Coalition promoting the replacement of dollar bills with dollar coins and the elimination of the penny. Unfortunately the organization does not appear to exist anymore.