I think you misunderstood what Zed's trying to describe. He doesn't want a website to do this. He's basically trying to create a protocol for music distribution. So instead of http://google.com you'd go to mp3://google.com and you could browse the website just like it were an album, etc.

'SoundCloud takes the daily hassle out of receiving, sending & distributing music for artists, record labels & other music professionals.'

Zed's primary users are people who listen to music, not music professionals.