Yeah, when you create a playlist on Rdio, you can choose collaboration options: ...

		alexophile on Aug 16, 2010 \| parent \| context \| favorite \| on: Ask HN: Holy Crap I need an Idea Yeah, when you create a playlist on Rdio, you can choose collaboration options: anyone can edit; only followers can edit; nobody can edit. And, as far as I know, there's no limit to the number of concurrent listeners.