The U.S. saw a December slump in vehicle sales, and analysts predict that 2008 may be the weakest year for auto sales in the U.S. in at least a decade. (Will it correspond with a boost in public-transportation ridership? Probably not, but we can dream.) Sales of pickups, generally a sure bet in the U.S. market, hit the wall last year; the pickup slump helped bump Ford Motors down to the No. 3 highest-selling automaker in the U.S., while Toyota moved up into No. 2.