This deal has ended.
Apple.com now has Apple Certified Refurbished MacBook Airs starting at $749 for an 11", 64GB, i5 model. That is a $10 price drop! Mac refurbs have an excellent reputation, and they carry the same 1-year warranty as new Macs (extendable to 3 years if you purchase AppleCare). You can upgrade to the just-released Mountain Lion operating system free! Ground shipping is free. Sales tax is charged in most states.