Robert Anton Wilson recognized John von Neumann's important contributions to modern computer culture and often mentioned von Neumann. See for example RAW's short story, "Von Neumann's Second Catastrophe," in the anthology When the Music Stops, edited by Lewis Shiner.
A new book, Turing's Cathedral by George Dyson, emphasizes von Neumann's role in the development of the modern computer. I've run across several interesting reviews, including a new one in the New York Times.
Meanwhile, a horror movies blog has a compiled a list of the "Top Ten H.P. Lovecraft Inspired Horror Movies."