Well, I've read The Man in the High Castle (which is currently the subject of a brilliant Amazon.com production, to my amazement) a couple times, and it got better with each read. I re-read the Transmigration a couple months back, after an interval of about 20 years and was amazed at how many familiar local haunts in Berkeley were mentioned on the second reading. Saw the film, A Scanner Darkly, but never read it.
His death from stroke at an early age was a real loss to literature in my opinion. He's always been one of my favorite sci-fi authors. It is strange to live where he once did and to pick up on so many local references in his books.