Cutting thru all this HYPE. I'm new to the on-line music thing and I hope this will be successful to. But the m4p aac is not compatable with mp3 players. I just spent $2,500 for the newest Alpine car head end with DVD/CD/MP3. I can't play music I paid for in my car player. It won't burn in mp3 format. If I burn it in data cd format, the mp3 player ignors it. I suspect this is an attempt to increase sales for iPod. What are we all going to do, sit in front of the computer or hang a iPod on the belt to enjoy this music? I think in order this service to survive, mp3 format will need to be made available for purchase.