David Jennings writes: "... On the one hand [Sirius'] E Street Radio is another example of the proliferation of music products I referred to a couple of days ago. But if you've been reading many of the entries on this site, you'll know how I go on about radio, how its value changes with the extra control that digital format offer, and how it complements the on-demand listening modes offered by MP3 players. (My essay What does on-demand media really mean? is the most comprehensive collection of my thoughts.) ¶ Crucially, once the amount of content the listener is interested in exceeds a manageable amount, programming or curating this content into a useful sequence provides extra value for the listener. And that's what radio does. ..." Link: D J Alchemi.