If the air was a LITTLE cheaper with a few more features, I'd be totally down for it. Two major pluses IMO are the battery life and the weight. Honestly, I carry quite a few books and projects around for my business/econ classes...It'd be quite a godsend if I could carry a laptop WITHOUT the charger, and without that much bulk in my backpack/briefcase.
Shoot, I could fit the laptop in my briefcase and it'd probably be thinner than my folders!