Over at the excellent new Philip K. Dick blog, Total Dick-Head, David Gill points to an audio interview of PKD chatting about Kurt Vonnegut, circa 1981. From the interview:
Interviewer: What did you think of Vonnegut's attitude towards his characters (in Breakfast of Champions)?
PKD : Disgusting and an abomination. I think that that book is an incredible drying up of the liquid sap of life in the veins of a person like a dead tree…that's what I think. I also love Kurt Vonnegut.