Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-gb) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)
Is your ambient light sensor working? Try covering it with your hand to see if it makes a difference (it's located near the camera). The keyboard won't light up in bright environments, presumably to preserve battery power.