Michael Robertson of MP3Tunes.com is here presenting about his new company. (He was behind the MP3.com group that struggled with the copyright issues in the past... but he's not giving up on this theme.) He likens the revolution of music distribution to the revolution we experienced with the advent of the ATM for banking. He demo'd how his new company can play a song on a number of platforms, from your PC or Mac, to your telephone, to your shoe. Yes, your shoe.
His bottom line for what will be successful in this field, is that you must have an open format (like MP3) and an open system, so any device can connect.