I truly love "Bladerunner" but there is little resemblance between the book and the film. Ridley Scott made his own movie with elements of DADOES in it and not much else. In some ways I think the film is a more interesting story than the book was.
The movie "Screamers" with Peter Weller is based on PKD's "Second Variety". It is a decent (if not inspired) adaptation. If you are a PKD fan, it is worth seeing.
"A Scanner Darkly" is my favorite PKD adaptation. As an aside, someone has finally found a vehicle where Keanu Reeves wooden acting ability can be used effectively.
Lastly, for PKD reads "The Man In The High Castle" is about as good as you can get. I hope someday someone has the balls to tackle this as a film project and not give it the typical Hollywood treatment & ending.
(Duhn, Duhn, Duuuuuuuuuuuuuuu!)