Last year the IPHONE, this year the MacBook Air billed as the world's thinnest notebook was announced this week at the Macworld Expo Show in San Francisco. Apple's products are very cool looking and very appealing to students. The MacBook Air features a 13.3-inch LED-backlit widescreen display that has a 1280 x 800 pixel resolution. The backlighting saves power and provides "instant on" response from the moment you turn it on. The device has a slightly wedge-shaped profile. It weighs about 3 pounds,...