I couldn't be happier with my new MacBook Air. It is unimaginably small and light. I saw it, I picked it up at the store many times. I knew intellectually it was light and thin but that didn't really sink in until I had it on my lap for the first time. Now, this is a laptop!
I got the SSD model for $2400 on Amazon. That was approximately $700 extra to get the SSD instead of 4200 rpm 1.8 inch hard drive model. I can't really tell you how much the SSD is helping but I can say that I get all the speed I want with this model. I don't and haven't thought, maybe I should use my 2 year-old MacBook Pro or 2.8 ghz iMac because I need more speed.
I bought the USB to ethernet adapter which is still awaiting a reason to be. I figured I will need it occasionally where wi-fi isn't available. I didn't buy the external DVD drive. I have an iMac with a good drive and the remote feature works perfectly. Downloads will suit the vast majority of my needs.
The Gen 2 MacBook Air SSD is what I was hoping for and more. I'm thinking this is my 90% time computer. The iMac is going to be for when I need lots of screen real estate and to keep my connection to the many hard drives I've got hooked up there. My MacBook Pro is an extra machine and is serving well while I get the data I want over the Air which I chose to build from scratch rather than transfer apps and data from my MBP.
I do a morning walk of about 1-1/2 miles to my local coffee place and I've always wanted to be able to carry a notebook. I tried taking my Powerbook 15 a shorter distance a few years ago and my back gave out after about a week. Finally, I'm testing the dream again. I've brought the Air with me every day for 10 days with nary a twinge. I got a light neoprene case (incase) for protection and carry it in a super light knapsack. These together only weigh a pound. I'm doing just fine with my 4 lb pack.
The MacBook Air is the Ergonomic King for sure. You can have it on your lap, stomach, knee - whereever. Moving it as you shift positions. All those easy options means that I don't get stiff or sore because I'm mobile while working. I'm not used to this level of comfort in my heavy-computer use.
Even in this bad, bad economy, the Air makes sense. For some people, the netbook might work. For me and I think many others, the access to a full-size keyboard, full-strength computing and 13 inch screen in a tiny 3 lb package is all the computer they need. I can't get what I want done with a Netbook. And, I don't want to try. My iPhone will handle the little stuff.
If you are an active knowledge-worker, you owe it to yourself to try one of these out next time you even think you might want a new computer. My days of lugging around a heavy notebook are over. My back is going to love me!