The Automotive X Prize comes from the same folks who developed the Ansari X Prize. This time the purse may well be double that of the $10-million space prize payout. The challenge? To build a viable, production-capable vehicle that can deliver in excess of 100 mpg or its equivalent fuel economy.
I support this as much as I support research/investment in making cheaper solar cells and in building more nuclear power plants. Obviously I agree with comment #6 (in the linked article) as well--electricity is the way to go.