There is an interview with Stanley Donwood over at antiMUSIC. Here’s an excerpt:
antiMUSIC: What has been your personal favorite piece of art you’ve done for Radiohead (and also your favorite outside of Radiohead)?
Stanley: That is too hard a question for me. I’ve been pretty happy, on the whole, with all of the Radiohead work that I’ve done. Though maybe the long landscapes in the Kid A booklet could be a favourite. My personal non-Radiohead piece was a now-lost image which was composed of the advertising strapline, logo and blurb for a Ford car called the Probe. I replaced the picture of the car with a photo of a big erect cock. It was very popular, but the magazine that had commissioned the picture refused to print it.