Today, Apple updated its MacBook Air notebooks. Prices remain the same, although they’ve all been upgraded with Intel Core i5 dual-core processors (and Mac OS X Lion, which was also released today). The lowest-end model ships with 2GB of RAM, but all others sport 4GB by default. Additional features include an LED-backlit display, Intel HD 3000 graphics, 802.11n wireless, full-size backlit keyboard, Multi-Touch trackpad, FaceTime camera, Bluetooth 4.0, Thunderbolt port, and up to 7 hours of battery life. The new models, which are available today, with free shipping:

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