Hello, I have been pondering the music subscription model and the fact that Apple does not offer one. Is it simply because they do not wish to, or are there also technical reasons that make it impossible or hard to implement within the iTunes-iPod-iPhone structure? It is clear that for a music subscription service to work one must enable the tracks to actually expire on the MP3 player if the customer does not pay the monthly fee. Therefore the device itself must somehow be able to keep track of time in a protected manner. As far as I can tell none of the iPod models nor the iPhone have a protected clock device... Does anyone know differently? Could Apple retrofit iPods to have such a capability should they wish to down the road? Any thoughts?