Sorry - that was kinda vague I guess.  
The genius remark is in the piece above referencing the idea of creating posters on site for the fans.
The quote about Grace's father came from the Hoopla interview in the previous blog entry.
It seemed logical to me that since he was involved in the concept of the Phish fans creating posters at concerts - this Indianapolis poster might be a new take on that earlier idea.
But  ? ? ? ?