Not to sound like a fanboy (I believe I posted something about my Air a while back on HN), but I'm a big fan of my 13" MacBook Air after a few months of using it. I agree with the original poster that it is more than sufficient for an everyday work machine.
As an aside, it's a pretty decent gaming machine as well... We recently started playing Borderlands GOTY edition LAN games at the office and my MBA ran the game much smoother than another a ~1.5 year old 17" Macbook Pro in the office. He had to downgrade the video to get it working nicely, while my MBA hummed along without much of a sweat.
As an aside, it's a pretty decent gaming machine as well... We recently started playing Borderlands GOTY edition LAN games at the office and my MBA ran the game much smoother than another a ~1.5 year old 17" Macbook Pro in the office. He had to downgrade the video to get it working nicely, while my MBA hummed along without much of a sweat.