Australasian Investment Review: You wouldn’t normally expect President George W Bush to understand irony, especially irony generated by the markets. There he was last week telling the International Renewable Energy Conference in Washington that the US should "get off oil" and again calling for more use of ethanol, despite concerns the corn-based fuel is driving up food prices and isn’t more environmentally friendly than gasoline. "We gotta get off oil; American has got to change its habits. It …