Well, it seems George Lutz stands to make some money due to the fact that he has registered the name "The Amityville Horror" with the U.S. Patent and Trademark Office. Here's a link to the actual registration information

http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78021172

I never have been able to make up my mind as to how much truth there is in the Lutz's experiences and how much was exaggerated...I read the book, saw the movie and still don't know although I lean toward complete belief; after all, a house that sustained a mass murder must have some paranormal acitivity within.