Skyfire, the Internet browser app that enables you to watch Flash videos on your iPhone and iPad, was launched early last night and caused a sensation. Aside from being a worldwide trending topic on Twitter, once Skyfire hit the App Store, it quickly rose to the top of the paid app charts. However, later in the evening, Skyfire suddenly disappeared from the App Store, and a quick visit to the official Skyfire website revealed that the app was "sold out". Of course, an app can't actually sell out like goods in a real store can, but the message on the site explained that the app had proved to be so wildly popular that people using it to watch Flash videos had crashed the servers. Therefore the app has been temporarily withdrawn from sale until the server issue can be repaired, and the company can be sure that it can handle so many users without crashing again. And of course what the overwhelming demand for Skyfire also shows is how much people want to watch Flash videos on their iPads and iPhones, and how Apple really should have sorted it out itself by now.