I await with bated breath the story of the bar bet lost that generated that title. (Never mind that it actually seems like an interesting read!)
By the way, the paper was really an excuse to document this IJulia notebook.
http://nbviewer.ipython.org/urls/raw.github.com/jiahao/ijuli...
If you run it on your local machine, one of the cells has an interactive slider that lets you control the breadth of the parallel prefix tree you generate.
And thanks for the direct link to the IJN. I really love that format, and will definitely run it on my machine!