Apple will never allow applications that can download music directly into the iPhone/iPod touch music library. As cool as it would be, don't count on it.
That said, you can always set up some kind of podcast feed that you can set your iTunes to to download the latest remixes automatically, but that would have to be a third-party thing. OCR won't do that because we want people to come to the site to get the music and participate a little (read Dave's writeup, leave a review, etc.).