http://www.macrumors.com/2008/11/14/original-macbook-air-available-for-1149-99/
Our affiliate partner MacMall notified us that they are now offering the original 1.6GHz MacBook Air with 80GB hard drive for $1149.99 after a $100 mail-in rebate.
This represents a significant drop in price for the 1st generation MacBook Air. The 1.6GHz model originally retailed for $1799 but has since been replaced by the NVIDIA-based MacBook Air that was introduced in October. Specs for the new machine are roughly similar, though, the graphics card has been upgraded to a faster NVIDIA integrated chipset.
The offer runs until the end of the month (or presumably when stock runs out).