End of an era indeed, albeit a long-gone era. Man, those two were something else. Real porn pioneers. I highly recommend reading the book "X-Rated" if you can find a copy. The story of these guys is unbelievable (ignore that shitty movie with the Sheen brothers from a few years ago). Artie Mitchell especially was one of a kind. They made a few good porn movies along the way as well. "Autobiography of a Flea" and "The Resurection of Eve" are two of my favorites.
I was lucky enough to hit the O'Farrell a few times in the late 70's and it was awesome, a sexual candy store. I especially liked the Flashlight room, where the chicks walked around in the dark with flashlights and they would sit on your lap and let you use that flashlight in lots of interesting ways. The sleaze factor was just great. Good times!
RIP, Jim. The Antioch boys are together again, raising hell like the good ole days.