This device works well for charging two devices at once and gives you surge protection and multiple outlets.
http://www.amazon.com/Belkin-SurgePlus-3-Outlet-Charger-Protector/dp/B00ATZJ5YS/ ref=sr_1_12?s=electronics&ie=UTF8&qid=1393257262&sr=1-12&keywords=belkin+ipad+ch arger
This device also works well.
http://www.amazon.com/Family-Sized-Desktop-Charger-Smartphones-USB-Powered/dp/B0 0DVH62J2/ref=sr_1_4?s=electronics&ie=UTF8&qid=1393257321&sr=1-4&keywords=multipl e+ipad+charging+station
You could replace your outlet witt this device which also works quite well for two devices.
http://www.homedepot.com/p/Cooper-Wiring-Devices-15-Amp-Decorator-USB-Charging-E lectrical-Duplex-Outlet-White-TR7745W-K/203921579