I was lucky enough to snag a 1.6/HHD in a store yesterday, and quite frankly I'm amazed. The MacBook Air really has to be experienced. It has a feel unlike any other computer--light but solid, like a precision instrument rather than a hunk of plastic. The rounded taper of the closed unit makes it wonderfully comfortable to carry. And its thinness really can't be conveyed by pictures. It's as thin as the lid of my old iBook G4--at its thickest point. The tapering makes one perceive it as even thinner, and introduces an organic warmness to counterbalance the aluminum. Quite honestly, the MBA doesn't feel like a flashy design statement. It feels like it's designed to be used ubiquitously, to be picked up and casually carried everywhere, like a magazine.
I'm a writer, and I need two things: a usably-sized, high-contrast screen and a responsive full-sized keyboard. The MBA knocks both out of the park. The backlit LED display is extremely eye-friendly, and the keyboard has a healthy degree of "travel" (depth of key depression) for ease of touch-typing. It's chiclet-style like all Apple keyboards these days, but the keys sit a tad higher than on the desktop keyboards. The black keys, which I didn't like when I saw the MBA in photos, seem just right in person.
Technosnobs can complain all they want about how the MBA can't, say, edit video on the fly. I don't care. Other machines can't do what I want to do, which is to be able to write and research productively anytime, anyplace. I can't emphasize enough how much the form factor and weight puts this computer into an entirely differently category.
A few observations:
1.) The click bar is a little small. I'm used to thumping it with my thumb, and this one requires more aiming than I'm used to. But the great workaround is to enable single-touch-as-click in the trackpad, which makes the whole trackpad into a click bar.
2.) The multitouch is more convenient than I had expected. I'm already loving the ease of moving between and within pages with simple swipes. It's different than on the iPhone, but easily mastered.
3.) The thin edge is a little too thin, as far as my forearms are concerned. I'm used to resting them on the free space of the keyboard side, but with the MBA that means you're scraping them on the edge. It's a minor irritation, and my ergonomics are probably better served by lifting them anyway.
4.) One thing I haven't heard commented on before: the MacBook Air really floats! At least, that's the impression one gets. Because of the tapering, when it sits on a surface you don't see the point of contact, so it looks like it's levitating.
All in all, I couldn't be more pleased. If you haven't snagged yours yet, know that it's worth the wait.