Android :: Simultaneous Photography Using Andriod

I am working on an art project with several other people that involves simultaneity and photography. We want to coordinate a series of events involving simultaneous photographs based on the Android system.

In simple terms, here is what we are proposing. Someone writes an app for Android Phone/Camera that makes the camera take a photograph at a predetermined time so that many thousands of people all take a simultaneous photograph. The art involved here is not only the synchronizing of the event to approximate simultaneity but also making "social networking" into an element of an art project.