They say Camera Connection Kit, and it works with my iPad 1 2, so I can as easily draw the Camera RAW files from my 40 D on the iPad!
But what is not documented is the use of microphones! Exactly! You can actually connect to any USB port on the CCK USB microphone and it is recognized by the iPad, so you get a much higher quality recording quality in apps like GarageBand or other recording programs.
