Here are some resources for using Mobile Devices (Apple iOS, Google Android) for creating digital stories.
Website: Digital Storytelling with the iPad
Tutorial on using StoryRobe, a free app in the iTunes store.
Tutorial on using Splice, a video editing app available on iTunes ($1.99) - only for iPhone 4/3GS and iPodTouch4G.
Demonstration for using ReelDirector V3.2 available on iTunes ($3.99) - also works on iPad.
iMovie on iPhone 4: Tutorial & Demo available on iTunes ($4.99) - only available on iPhone 4/3GS and iPodTouch4G.