Jonathan Houser, of Cinemek, has a great iPhone app out called Storyboard Composer. It is a really nice application that allows filmmakers to quickly and easily create a storyboard out of photos taken with their iPhones. There are a lot of great fautires with this little app: you can add captions, camera movement, and animations to the storyboard. You can purchase it for only $4.99 directly from iTunes. Watch the video below for details.
Image Credits: screen shots taken from cinemek.com