Two questions from a perspective Mac Book Air purchaser . . . .

1) How warm does the computer get after extended use? I saw one review that the reviewer said "it was a delight to use in your lap." The Mac Book Pro is use gets too warm to sit in your lap after about 15 minutes.
2) It was my understanding that it is impossible to boot from a hard drive connected via USB. What then do you do when the internal drive fails or gets corrupted? Is there some kind of unique connection to the Air external Optical drive that allows it to boot from it? I back up all my Macs by cloning the drives to external firewire drives so that if there is an internal drive failure, we can boot from the clone and be back in business. Is this not possible on the Mac Book Air?
Thanks
GFB

you can boot from a drive connected via usb, whether it be a usb hard drive with a bootable clone, or the MBA usb superdrive.
I know because not only have I read it, I have done it. I love my MBA and use a WD Passport usb drive to clone and backup the MBA. I did the bootable backup via CarbonCopyCloner. I have the MBA usb superdrive and did an experimental OSX install from the Install disc on a second partition that I created with that disc without erasing the first partition. Both worked.
I use the MBA primarily on my lap on the sofa -- no heat problems. Just follow directions and don't set it down on pillows or cushiony soft surfaces that block the heat exhaust vents on the bottom.
It is too easy to use on the lap, why bother sitting at a desk or table.
Yup, luv the air.

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