The US administration appears to have made a connection between Energy Efficiency + National Security...

In December 2002, the National Highway Traffic Safety Administration announced that it would raise fuel efficiency standards for pickup trucks, vans + sport utility vehicles (SUVs) by about a 0.5 mile per gallon annually in the 2005-2007 model years, or by a total of 1.5 miles a gallon by 2007 (21.0 mpg for MY 2005, 21.6 mpg for MY 2006, and 22.2 mpg for MY 2007).

The development of new vehicle + fuel technologies, through support of the fuel cell "FreedomCAR" initiative, hybrid vehicles + ultra-low sulfur fuels should also help to get things moving...

In fact, I think it will be most interesting to see what else happens along these lines if the country where President J. F. Kennedy announced his intention "Before this decade is out to land a man on the Moon and return him safely to the Earth" should decide to become as energy-efficient as possible...

... perhaps by beating the efficiency standards set by the Japanese + Germans who currently dominate the small, sexy + fuel-efficient (capable of up to 61/68mpg!) car market...