CNET:

To encourage repeat viewings of his latest flick, writer-director Rian Johnson released an audio commentary track that you can listen to on your iPod.The director of the sci-fi action movie “Looper” wants you to bring an iPod into the theater to listen to details of how each scene was filmed.In a Tumblr post, Johnson, who also directed the AMC TV show “Breaking Bad,” provides a downloadable MP3 file to be played during the movie.

This is a really interesting idea and I wonder if it will catch on. I’m a huge fan of commentary tracks on DVDs.