As noted by AppleInsider, MacBook Air supplies are beginning to dry up as Apple's annual Worldwide Developers Conference approaches. Currently, the 13.3-inch 256GB 1.8Ghz MacBook Air is out of stock at Amazon.com, with a listed one to two month waiting period. While the low end 13.3-inch MacBook Air is in stock, the 11.6-inch MacBook Air is in short supply. Amazon lists an inventory of just ten 1.7Ghz 128GB 11.6-inch MacBook Airs and just one lower end 64GB 11.6-inch MacBook Air available through a third party.