The debate at the radio show is over whether the novel is dead. (Believe it or not, this has been a discussion between public intellectuals and writers for most of the 20th century.)
Billy then gets to speak, and he tells the world about the Tralfamadorians and Montana Wildhack and all the rest of it.
He's booted out of the radio station during a commercial break.
He goes back to his hotel room and falls asleep with the Magic Fingers working.
He wakes up on Tralfamadore with Montana Wildhack, who is breast-feeding their baby.
Billy tells Montana that he has been walking around Times Square and that he watched part of a porno she was in.
Montana says okay. She says she has heard about what a clown Billy was during the war.
There is a silver locket hanging between Montana's breasts that holds a picture of her mother. Engraved on it are the words, "God grant me the serenity to accept the things I cannot change, courage to change the things I can, and wisdom always to tell the difference" (9.33.21).
(Does this ring a bell? You might remember that Billy's optometry office has the same saying framed on the wall in Chapter 3, Section 13.)