I bought a MacBook Air a few months ago to use as a travel computer so that I could travel light. I had planned to use it just when away for work. A project I was working on required that I set-up a test Mac OS X Server machine. The only machine I had that was capable was my 17-inch MacBook Pro. As a result of this I’ve been using the Air as my only Macintosh portable machine. I’ve had to add a 4-port USB hub and an external USB drive for my iTunes folder. But apart from that the machine has met my needs perfectly. The screen was a bit small for my tastes but I’ve got used to it. I use Spaces in Leopard to increase the real estate I have. The lightness of the device is the biggest plus point. My shoulder will thank me if I think I keep the Air as my portable Mac and use the MacBook Pro as a mobile music workstation for Logic Pro, EZDrummer and GarageBand. I’ll also use it to record midi drum information from my Roland drum kit. Iv’e had to put that in a different room from my other stuff.