Well, I picked up a "Rev. A" MBA the other day since they're $999 refurbed for the 1.6GHz HDD variety. I decided to do my mad scientist experiment and put Pro Tools 8 LE on it.
I used an Mbox 2 with it and PT installed just fine, I kind of expected it to tell me to get out of town, but it didn't. The Mbox installed just fine, too. Of course, I can't use an ilok since there's only one USB port, maybe I'll try a hub if I run across one.
I loaded up a project I had saved with a drum track, two guitars, and bass. To my disbelief it ran just fine with the file on the desktop. So, a 4200rpm HDD ran a PT8 LE project from the desktop on a MBA Rev. A.
Recording, I'm expecting, will be interesting. I haven't tried it yet, but I will try some today if I have time.
Reason 3 choked really badly until I upped the samples in the buffer, which would probably make live recording a problem. It seems to be fine for messing around with light projects, which is cool.
CPU and Mem use never pegged during either application, maybe I'll try rewiring Reason to PT and see if that does it. Playing a prores QT video over Reason did get the CPU to max out usage, though...not surprising.