the problems is that it works only with very slow shoot, better for interior/architecture, static product shots, shooting studio fashion is a nightmare, it simply takes too long for the captured images qued up on the iPad, I certainly like the concept and hopefully in near future we can see a digital back or DSLR with native communication to iPad so we can skip the tethering, everything can save to CF cards, we jsut need a nice preview on the iPad to avoid surprise.
Pingang
Hi Neil, if you're going to use a laptop or an iMac then you can use the "create network" function in the WiFi menu and let the iPhone connect to this network
Note that Laptops' networks are not particularly strong and that if the mac goes to sleep or is restarted you'll need to recreate the network
This was with an iMac:

Hope this helps;-)
Yair