I saw a couple of articles in Gizmodo earlier commenting on how their new macbook airs were freezing and crashing suddenly and without warning. The first article was suggesting that the problem affected only the BTO macbook airs with 8gb of ram. Then the second article (New MacBook Air Crashing? Blame Google Chrome, Probably) wondered if the problem was caused by Google Chrome. It's really worrying. I don't think Apple has commented on the issue yet.
Has this problem been happening on your new Macbooks? And if it has, does it happen while you're using Google Chrome?