Filmmaker Jonas Mekas has invited several filmmakers to make short films for the video iPod. One of the filmmakers is Jim Jarmusch, whose three short films - Relaxation, Hagfish and Murder in the Red Barn - all feature Tom Waits. The movies are $ 3.99 or $ 6.99, depending on the quality. There's also a preview available at Jonasmekas.com.
UPDATE: I have not downloaded these files myself, but please be advised that some people have had some trouble in doing so. Do feel free to post any info on the comments so we can all benefit from your experience.