I think the Airbook looks quite interesting, but can't do the Mac thing. The issue is Excel -- I use a lot of custom keyboard macro shortcuts at work and even running Excel or bootcamp or whatnot, not having the exact same keyboard as the one I use at work makes it just not doable. It's a shame because it certainly is gorgeous.
I bought another Sony ultraportable right before I heard about the Lenovo. The Lenovo is certainly attractive -- the bigger screen and marginally increased resolution would be nice for work. Still, it is rather clunky looking. Who knows though. Getting kind of tired of replacing the Vaios as they all seem to break every two years or so...
Oh, and I don't get the poster who said the screen resolution of the ultraportables doesn't work for him. That must mean no laptop works for him, unless it's one of those monster desktop replacements, as ultraportables have as much, if not higher, resolution than many standard laptops.
Anyhow, it was interesting. I had a business trip to Boston the other month and unfortunately that was when I discovered my prior Vaio had just exceeded its two-year lifespan. I borrowed one of the company's Thinkpads (wasn't the X300). It wasn't that much bigger, but I guess I'm used to a smaller laptop. I think it says something that I'd rather spend $2k+ of my own money than have to deal with one of those clunkmeisters again.
Best,
-Jason