In addition to mapping connections, your map should also rough out UI (user interface) wireframes of several screens of your map. These do not need to be developed layouts, rather a basic layout of labeled boxes that suggest placement of content.
A good article to read:
Sketching for Mobile Experiences
And if you have a tablet and are are willing to download a free app, this looks like a simple way to prototype your app directly from sketches:
POP: Prototyping on Paper
Also, just for kicks, these are pretty sweet:
Some examples of mapping interactive experiences: