My feeling with the air is this: It should be on offer as a "lite" alternative to the existing MacBook line. Basically go with the current line (MB, MPB) and offer an option without the optical drive and some of the ports - in effect, it's like buying a "sugar free" cola. So we can have a MacBook Lite (cool, thin white poly) and The MacBook Pro Lite 13", 15"- (though not so sure a 17" that thin will be sturdy enough with a thin chassis.) I mean, it makes so much sense. Some like a full-flavored notebook and some simply want a zero-calorie version.