Six bucks is a great deal for this 2-Port USB wall charger. (I travel with a 5 Port USB charger and love the long AC cord on it, but it might be overkill for others.)

http://feeds.boingboing.net/~r/boingboing/iBag/~3/Vnoq-aZ6L0o/2-port-usb-travel-wall-charger.html