Great post NS. I am in the same situation. Picked up an Air as a compliment to my iPad and 17 inch MBP that I use at home for the heavy lifting. I made the Air a family computer my removing the email, address book and a few other apps so that personal info is not stored on it. I could have set up profiles but wanted as simple as possible. I even set up our networks and iTunes libs to access it. Nothing is stored on the Air. Great on the go device.
Thanks to everyone who left compliments on my post.

It's actually been an interesting experience living just with the Air and iPad while the iMac is being repaired. Like you, I didn't want email or contacts on the Air, so my iPad is serving as my email machine while the iMac is away. Otherwise, the Air has smoothly replaced every other function my iMac has been serving. In fact, I could very well live with the Air as my primary computer. The only thing keeping me from using it as such is that I have a number of external hard drives I keep hooked up to my iMac for backups and storing large media files. Detaching and reattaching them to the Air every time I wanted to take the Air out with me would be a chore.
I'm still not sure how much use the Air would get once the iMac comes back. I wavered over getting the Air for the longest time, but there's just some formatting tasks on MS Word I sometimes need to do that can't be done on the iPad, and I spent one too many times twiddling my thumbs when I could have been getting some work done if I had a notebook computer with me. But regardless of how I split my usage between the iMac and the Air, I expect my iPad usage to stay the same. The portability of the Air tempted me to try reading ebooks on it, and sure, reading ebooks with the Air on my lap was a better experience than reading them while seated at a desk, but in the end, curling up with my iPad is for me the best reading experience. Surfing the web while on the go or sitting on sofa/in bed is also more comfortable with the iPad than the Air. Typing with the Air in my lap is comfortable, but so is typing on my iPad, and as I mentioned before, I can do so in more positions with the iPad than I can on the Air.
All that said, if I could afford only one computing device, then I would have to reluctantly go with the Air, as it maximizes function+portability. But since I'm lucky enough to be able to have multiple devices, you will pry the iPad from my cold dead fingers. I do need at least one "full" computer in addition to the iPad, but that could be the Air, iMac, Dell, HP... I don't much care.
And I now think everyone's learned never to compliment me, or I'll never shut up!
