How to Use application multitasking in Apple's iOS 4

Learn how to multitask when running iOS 4! Apple's new iOS 4 for the iPhone and iPod Touch brings with it a host of new features. While that's certainly a cause for celebration, there's also, believe it or not, a downside: learning how to take advantage of them. Happily, the web is awash in helpful video tutorials like this one which make the process a pleasure (and a simple one at that).