How about the words "Capitalist Pigs" on the quarter. The US can show the world that we have a sense of humour. Or we can have sell the words to the highes bidders: "US QUARTER - LEGAL TENDER - Brought to you by American Express"
I think Liberty is the only real standard that always should be on our coins..it is the most important concept of america IMO...I am okay with it being represented by the statue of liberty...but the concept needs to be there...if ever there was a real tradition when it comes to US coins that represents what the US stands for (or projects itself to stand for through history and coins) its the concept of liberty.