I am beginning to see more and more mobile applications that use photos and maps as GUIs (graphical user interfaces). In the world of mobile augmented reality, the photo can be the main menu of the mobile application.
The image on the right is from an application called TouchInspect by Mobile Epiphany. The founder of Mobile Epiphany, Glenn Kletzky, has many years of in depth experience in the electronic games industry and takes a unique and graphically rich approach to many of the GUIs in his mobile data collection applications.
This is a very interesting approach to GUIs. It is not just a text based menu system, but images that can quickly paint a thousand words. Glenn describes his GUI design as a finger-touch-based interface that is trainable within an hour.