This method relies on having a computer or laptop to work so it isn't very practical because you can see the images on the computer/laptop without the need for a laptop.
I found a method of shooting tethered to an iPad but it had limitations too. You can see the details here:
http://jesserosten.com/2010/wireless-tethering-to-ipadI can see a solution like this working in the near future but at the moment I couldn't show my employers a method that involves jailbreaking heir new iPads.
Cheers,