I can't tell you how many times we have come across USB chargers that can be plugged into an outlet, so why not cut out the middleman and simply convert the outlet to USB? Instructables shows you how.
Not only that, the guy behind the hack claims it can be done in 30 minutes on a budget as small as $10. In a nutshell, he just inserted two apple mini usb plugs into the outlets and tucked them back in the wall, but you could soldier the wires to the chargers if you have the skills to go that route. Yeah, you could just keep the chargers plugged in to the regular outlet, which is even easier and seems like less of a fire code violation, but this certainly looks a whole lot better. [Instructables]