Dunno if anyone heard this, but some guy wrote a book about Hardware Hacking..and the GamePark is in the title! Read more about it here Or do a google news search for gamepark...Pretty cool B)
one of the administrators at anothre site I go to, Albert Yasurro (sp?) of AtariAge wrote a section in the book that came before that one, which dealt with general hardware hacking. The bulk was written by the same guy, AFAIK