Suds for Drugs
Tide detergent: Works on tough stains. Can now also be traded for crack. A case study in American ingenuity, legal and otherwise.
I'll post market design related news and items about repugnant markets.See also my Game theory, experimental economics, and market design page. I have a new general-interest book on market design: Who Gets What--and Why The subtitle is "The new economics of matchmaking and market design."