I got the camera connector kit for the iPad today and quickly tried out importing photos from my wife's Canon SX1 IS and my Nikon D300.
There are two connectors, one which connects SD cards directly to the iPad and one that connects anything USB (for connecting directly to the a camera).
When I plugged in the SD card from my wife's camera (she shoots CR2/RAW plus JPEG) it immediately recognized that there photos attached and the program recognized that they were JPEG+RAW and asked if I wanted to import them. The import went flawlessly.
I then shot NEF/RAW only photos with the Nikon D300 and the importation went equally well and the iPad had no problem rendering the photos in the Last Imported album.
This answers my first concern about using the iPad as a sustitute laptop. Will it download and recognize RAW photos? It does.
I have no idea, yet, how one would tranfer photos from the iPad to my desktop. That'll be the next thing to play with.
Next thing needed: an iPad version of Lightroom or Aperture.
Anyhow, I thought some might want the "after playing with it for 10 minutes" answer to the importation and recognition of RAW files.
SD