I can’t say I’m surprised the first shipment of Firefox phones sold out. At just $80 the price is certainly right. Mozilla is not aiming at the high end of the market at all, they are making the Firefox OS phones affordable for just about everyone. Ubuntu’s phones apparently will not arrive until next spring or summer, thus giving Firefox OS a huge first mover advantage. A lot of the Linux folks I know said that they were more than willing to give a Firefox OS phone a shot, even though they already had other mobile phones. This bodes well for Firefox OS, it has a chance to steal away a certain number of Android users in particular.