If your AC outlet has been wronged by some gadget that sips extra power after charging, you need the Outlet Regulator (though I like my name more), a working concept by student inventor Conor Klein.
His device uses a timer circuit and electromechanics to physically unplug an electronic from the wall. Sure, products like the Belkin Conserve Surge do the same thing without wires falling out of sockets. But Belkin's solution doesn't offer such a tangible F U to your mobile phone. [Connor Klein via NoSmarties via Unplggd]