I read a Wall Street Journal article (Feb. 1 '07) that talks about the limitation on corn-based ethanol is our transportation system. It's produced in the Mid-west, but the customers are mostly on the coasts. The only way to transport it is by rail and the railways are maxxed out. So, despite subsidies, tax breaks and tariffs, foreign shipped in sugar cane based ethanol is competitive and already makes for a significant percentage of what we use. What's implied is any increased usage will be largely imported. Countries worldwide are jumping in to ethanol production.