Your kidding right, that is a sexy machine. In the ultra-portable line you pay for sleeky and sexy and this laptop has loads of that.
Would be really handy if you travel a lot, just toss it in the briefcase or backpack and off you go.
The original MacBook is just as portable. How small do you need a laptop to be? The only positive to this thing is that it's more eco-friendly. However, the slower clock speed, smaller hard drive, and the absence of a CD/DVD drive does not justify the larger price tag and smaller size.
Not to mention the upgrade you can make from a 80 gb hard drive to the 64gb solid state hard drive. I know it's solid state, but it easily adds $1000 to the price tag for the top end MacBook Air.
IMO, Apple would have been very wise to include WiMax support with this laptop, but it just didn't happen.