According to MoviesOnline.ca, Radiohead have been approached for doing the score for the Scanner Darkly film:
The movie is doing very well in test screenings, but the #1 complaint audiences have is with the score. So I can only tell you this anonymously, but the producers have approached RADIOHEAD about doing a new score for the film and it looks like everything is going to go through.
So in addition to an awesome animated Phillip K. Dick film, we will have a brand new Radiohead score to look forward to. as far as I know, this is the first time Radiohead has ever done a score for the film. While this is still a “rumor” at this time, I would give it a 99% accuracy rating at this point.