I have no idea whether or not this has ever been mentioned anywhere, but I was very surprised to learn that there exists a novel of Infinite Crisis, written by Greg Cox. A friend of mine just got ahold of an advance review copy and is in the midst of reading it. He says that it's the same story as the comic - mostly Superman, Batman, and Wonderwoman with the E-2 Supes and Earth-Prime Superboy - but he thinks the author added his own take to the characters and events.
I still wonder if Elliot Maggin is getting royalties for the use of Superboy Prime, or if the reason DC radically changed the character was to side-step the issue.
http://www.amazon.com/exec/obidos/ASIN/0441014445/theamalgamatronA/