A bay area resident who has several thoughtful writings and talks about human computer interaction and more recently a piece on global climate change. AFAIK he is unemployed so he has lots of free time to work on personal projects which may be inspired by the readings on his bookshelf.
Probably refers to "PI", the 1998 movie written and directed by Darren Aronofsky. The main character was an eccentric mathematician who was obsessed with patterns in the decimal expansion of the transcendal number pi. If you have not seen the movie I would encourage you to look for it as my summary is not adequate.