Stephen Orr has written a cool application for Nuns on the Run.
The purpose is to handle all the line-of-sight issues for you (it's an assistant, not a complete game). The application requires iOS 5.1 or later (Ipad only).
Whoever wants to playtest the extension can ask me the files by simply sending an email to me.
You will get a new castle map, a new private map, 20 extra cards and a sheet with extra rules. Note that it's a prototype version. The graphics are less exciting than the original game.