One of the ideas I heard people at Dynamicland mention is to have Realtalk project highlights over the dependencies (this would be possible because Realktalk is self hosting, all the code that runs Realtalk is printed on paper)
In practice, when I wanted to see how something worked, I would just ask somebody in the room and get pointed to where the dependency was.
Other than the ones hiding behind the projector in the ceiling you mean?
Kind of like the Wizard of Oz I suppose...