Check out this German site for software that will convert iTunes .MP4 files into .ogg or .mp3 if you download a certain .dll to add to the software which enables you to convert to .mp3 instead of the default .ogg.
Works flawless as I paid for the program and have been converting iTunes downloaded music into .mp3.
Here is the link - http://www.tunebite.com/index.php?affiliate=1002
