http://www.redbooks.ibm.com/abstracts/sg246366.html On the topic of mainframes, IBM's Redbook, a introduction to mainframes and how they work for the people who work on them.
http://mainframe.typepad.com/blog/2006/08/mainframe_meets.html Internal videos made by IBM poking fun at their mainframe sales divison. "Excuse me, do you have 5 minutes and 1.5 million dollars to spare?"
http://www.dynamitemap.com/ A map of all the different buildings and locations from the movie Napoleon Dynamite.