You hit this on the head regarding social presence. What I started to pick up on as listener count increased and Twitter comments unfolded throughout the day Saturday is that as #ds106 participants were contributing music to the radio stream they were establishing a voice and connecting with each other through sound. Utterly random in sequence and diverse in genre and form, the audio told it’s own story about the participants. I see this as the polar end of music recommendation services like LastFM and Pandora … don’t get me wrong, I think those music recommendation services are a great tool for exploring new sounds – just different than what I saw emerge on #ds106 radio. The setup I stuck together facilitates and broadcasts the sound of a community – not generated by an algorithm, but by people.