sclitheroe reminded me! I forgot to brag that I got to play with an iPad last week!
I went to TEDx at the UofC and there was a guy who had an iPhone app for hospitals where the computing is done in the cloud. Images are rendered on a server and sent to the iPhone, even as you scroll around or zoom in on them. It's really cool.
They're working an iPad version as well so he had one that he bought in the US and let us fool around with it a bit.
They're even lighter than I expected and the screen is gorgeous.