Frank, was, and has been one of my all time favorite musicians, for a host of reasons. Seen him on several occasions in concert. My brother, years back, also played with him, as a drummer. This interview, which was slightly mentioned above, may be interesting, to those, who were curious about him...especially towards the end.
http://www.youtube.com/watch?v=UDYzuwG-gOE&feature=related