Can I use the USB adapter in the Camera Connection Kit to connect devices like keyboards?
Yes, if the keyboard is sufficiently low power. We have found that Apple’s aluminum keyboards draw too much power, and some Microsoft keyboards we tried result in a “device not supported” message on iPad, but MacInTouch Reader Antony Gravett reports success with other keyboards, including the original iMac G3 keyboard, Logitech diNovo Keyboard Mac Edition, and a $7 roll-up keyboard.
