LaCie Starck Mobile USB 3.0
This collaboration between Philippe Starck and LaCie would make a perfect compliment to your newly purchased MacBook Air. It's sleek, attractive and with 2mm of aluminum casing it's protective. Unfortunately you will have to wait to take advantage of it's faster USB 3 transfer speeds as it requires the use of an express-card slot of which only the MacBook Pros come equipped.
The 3c markets here are awash with various small portable hard drive cases but with my current fail rate from purchases at around 50% I've come to appreciate the quality of LaCie.
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