This is how you can make your iPhone 4 into a much more versatile video camera
By Werner Ruotsalainen
(Note that this article, as with most of my stuff, shows you not only how the camera can be reconfigured, but also shows you - how you can play back a YouTube video frame-by-frame; - how you can create and upload packages to your Cydia [an alternative to Apple's AppStore] repository and, last but definitely not least, gives you a full source-level explanation of the entire app that I've written to quickly switch between the different iPhone4 camera configurations. No one has released anything similar for the iPhone 4 or the iPhone 3GS [for which I'll also release a very similar utility in a few days] before!)