Ok, this macbook air has some good points and bad points, but there's one very large glaring problem. It seems to have such a narrow target market. Lets look at some of the possible people that would consider this laptop:
-Techie on the move- No external drive isnt a huge deal for this person, they use a lot of USB drives and when necessary can either use a cd emulation using a disk image, or just plug into one of the USB CD drives they already have. However the "techie" will most likely want built in ethernet for connectivity because frankly ethernet has numerous advantages over wireless connections, especially if you're dealing with latency diagnostics. Also keep in mind that the footprint is HARDLY ultraportable, i'd lug around my "heavy" 4 pound Dell x300 over this any day because of it's smaller footprint.
-Ordinary College student- Yes it will fill their computing needs, basic flash drive in the one USB port, external drive if in their dorm room, can play music, surf the net, and plugs in in the classroom, or can run off a single battery if in a coffee house or other place where they might not have a power plug. But price? Unless you're a student having your parents pay for a private education, odds are that you're not going to be able to afford this little puppy.
-Computer power user- Non replaceable ram, no ability for extra battery, small(ish) default hard drive, no firewire, single USB port, certainly not the ideal customer.
-trendy person that always wants the newest thing- Ahhh here i think we've found our most likely market. this person may not care about no firewire, or single usb port, or wireless only, not being able to play games at a decent rate, will most likely replace the macbook air before needing more hard drive space or ram. Price point is not really an issue as it's considered part of the package when you're on the leading edge of tech. Yes i see this being the laptop for them.
-gamer- Uhh no
-business traveler- perhaps another likely market due to companies paying for computers a lot of times, and the weight is very appealing. However lack of being able to swap an extra battery in for long periods of time without charging, a webcam (which some companies ban due to corporate secrets and proprietary information). This market probably won't be too bad, however i still think that seeing as how a large portion of businesses still rely on PC's, the market may not be as big as to warrant all these shortfalls for other markets.
I myself love ultralight computers, i have a Dell x300, a Dell 700m, a Nokia N800, a Palm Treo 700w, and i used to own a Dell 300m. I've fallen in love with many ultralights from the C1 picturebook, to the OQO. However i even have to admit that for the given price point, the Macbook Air makes too many compromises for the simple goal of slimming it down. The 12 inch powerbook is the PERFECT form factor to allow full sets of features in a portable yet stylish case. Take the 12 inch powerbook chassis, change the screen to LED backlit, create lit keys, change the slot loading dvd or cd drive to a DVD burner, reduce the hard drive to a 1.8 mm instead of 2.5, install the new intel chip, add 802.11n, give the option of the SSD, perhaps even blu-ray for a large premium. 2 USB 2.1 ports, firewire 400, mini dvi connector, magsafe power connector, and magnetic lid clasp. THIS would be perfect! The 1.8mm hard drive might allow a slightly larger capacity battery, or even if not, a 12 inch or 13 inch LED backlit screen should be able to power it for 3.5-5 hours depending on optical and wireless usage.
The removable hard drive would more than make up for any shortage in battery life. Heck perhaps even make the DVD burner modular and give the option for a second battery, or a blank to save weight. I think that this type of laptop would appeal to a HUGE array of markets. Heck, you could charge the full $1800 for this, not have to make intense design changes, and STILL come in at budget. My guess is that the chassis design alone cost apple an arm and a leg in development, when they had a perfectly elegant form factor already designed.
This is how i see it, when the iPhone came out, people were either in shock at how nice it was, or thought that it was an expensive luxury. The difference here with the Macbook Air is that people are again either in shock at how nice and thin this laptop is, OR thought that it was an "OVERPRICED" luxury. Don't get me wrong the iPhone may be a little on the expensive side, but it's a fantastic piece of beautifully crafted hardware. The Macbook Air in my opinion has all the glitz, non of the features, and an incredibly high price tag.
People are only willing to pay so much of a premium for style and ultra portability, i think Apple overshot this by a wide margin, and i think in the end, it's not going to be a good decision. But who knows, i could be wrong.