I still don't see why there is any need for a camera on the device.
A back facing camera is ludicrous, no one is going to hold up an iPad to take a photo. A front facing camera is stupid as well, besides the fact that half the networks still wont allow video conferencing over 3G, it's a case of either holding up your iPad in front of you, buying the stand, or crouching over it like an idiot.
Any camera that goes on this device will be Apple caving to public pressure, unfortunately the public are idiots who have no idea what they want. If I asked my customers want they wanted, they would reply "a faster horse".
No one is going to use the camera, it's going on there because it will make the device sell better and it costs pennies to stick in a cheap low grade camera.
Rear facing camera works great for document "scanning" type apps.