Just got home with a new Macbook Air. 1.8GHz and SSD. Bought it before I had to go to work; now I'm gonna open it up and update this post with my first impressions.
First thing I noticed: It was funny, at the store, everybody gave me a strange look when they found out I was interested in the Air, like, "Are you serious?" Then I said, ah - but I have an iMac at home already. And then they all had the exact same reaction - which totally explains the expected "user base" the MBA is designed for - "So you're looking for a COMPANION Mac, ahhh." I was a bit confused myself, as to what Apple had in mind when they released this thing, but now I know it's a perfect companion for current Mac users who want/need a little more productivity from their Mac environment (in the form of a laptop in this case).
So, for the uninitiated: (spoiler alert!) "
Congratulations, you and your Macbook Air were made for each other." I like that.
Why I "bit the bullet" and bought the SSD version: "Notice: Wait a few seconds until the sleep indicator light on the front of your Macbook Air starts pulsing (indicating that the computer is in sleep and the hard disk has stopped spinning) before you move your Macbook Air. Moving your computer while the hard disk is spinning can damage it, causing loss of data or the inability to start up from the hard disk." No worries

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...umn, it just came to life, without me touching anything - all I did was plug in the power chord!
"Time is a wave, there's no time in this place!" - T.M.V. Rather: time flies when you're having fun. This is just joy. So far. No problems to report, everything works. This is probably the best-going first night with an Apple product I've ever had.