How about putting the Gipper on a $5 coin?
Then we can get rid of pennies and the dollar bill.
A $5 coin is not such a bad idea. Japan's largest coin is 500 yen, which is about $5. They also have 100 yen coins (one dollar). These coins are in common circulation, and well accepted, unlike the PC-driven Carter Quarter (SBA dollar), and those dumb fake gold squaw coins.