Ben Brooks on the rumored Apple cloud music service:
I don’t know what the service will look like, but I doubt that it will work like most of the optimistic audiophiles hope that it will. I doubt that you will be able to play everything in your library using Apple’s cloud service.
I have been saying something similar for a while now. I have even gone as far as to say that I think you will only be able to play music you purchased through iTunes and not other music that just happens to be in your library.