[Dollarama] - USB Wall Plug Receptacles - 2.4A - $4 - Wpg YMMV
Gave one a try, installed in seconds, and currently charging both a full size iPad with a third party cable (and Apple's can be finicky) AND my Nexus 7" tablet at the same time so I'd say these are a go for the price especially considering unlike many other designs on the market, they do not utilize one of your existing plugs. Went back and bought more locally in Winnipeg. Also built in is a small (3 LED bulb) nightlight on the underside and is operated by the button you see on the front AND automatically with a light sensor built into this faceplate as well (so they turn on at night automatically). Again, all for the price of FOUR BUCKS.