I use an 11" Macbook Air as my only computer. I got used to the lack of screen "real estate" and now, I don't mind a bit. It's more powerful than a netbook, which I need when working remotely with photo editing and web work.

It goes with me when I tour. For pictures, blog and journal updates, and as a charging battery for phones and lights, it's irreplaceable. I generally steer away from technology and prefer a map to a Garmin, but the little skinny Macbook is a really great creature comfort.