The MacBook Air has arrived, a third MacBook model that brings incredibly small size to Apple's laptop line at a premium price.

After getting some hands-on time with the MacBook Air at Macworld Expo, we've got some first impressions. At the risk of sounding obvious, the MacBook Air is incredibly light and tiny. We'll be updating this article with the full MacBook Air review once we have access to a model for benchmarking purposes.

Its looks owe a lot to the MacBook Pro and previous silver Mac laptop models, but the MacBook Air's curved edges and tapered shape are unlike anything we've seen on a Mac laptop in a long time, if ever. (Someone likened it to a really big iPod nano, and that's not far off.)

Because of the MacBook Air's curves, there aren't flat spots on the side for ports, as there are on existing Mac laptops. On the left side, near the back, is a slightly recessed space on the MacBook Air's underside with a MagSafe power connector. As a result, the MacBook Air comes with a different power brick, a smaller 45W brick than the one the MacBook uses.

And the adaptor's tip is different, a right-angled silver shape that's designed to nestle snug against the MacBook Air's side. If Apple had used the current MagSafe adaptor, it simply wouldn't fit - that adaptor sticks straight out, an orientation that would prevent you from setting the MacBook Air down on a desk.

On the MacBook Air's right side is a drop-down door with three ports. (It's not a door that you flip open to expose the ports - you actually pull the door down, and the three ports come down from within the computer.)

There's a standard speaker/headphone minijack, a USB 2.0 port, and a micro-DVI port. Yes, IT people, this means you will need to carry around yet another spare set of Mac laptop display adaptors - mini DVI for MacBooks, DVI for MacBook Pros, and micro DVI for MacBook airs.

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