this. the lack of is a deal-breaker for me.
It's a deal breaker for most of the people I know who would be in the market for MBA's. Although I don't really understand it. I've got backlit keys on my 17 inch, but when they're off I can still read the keys if my display is on. Can I read the keys on my iMac keyboard when the lights are off? No, not under any circumstance. Especially if you keep your keyboard in a keyboard drawer. IMO backlit keys make more sense on a desktop.