I think there's a huge pent-up demand for software that makes it easy for artists to publish their own content on their own websites easily and also makes making and collecting payments as easy as downloading torrents. Probably something like that already exists, but the fact is that most of the content seems to be aggregated in different kinds of services that the artists don't really control themselves.
This is exactly what I'm trying to do with Gumroad: http://gumroad.com (I would love to hear your thoughts and feedback)
it sounds like these guys want control of the process and the users. you could ping them and provide something they don't have at the moment, like a better solution to the downloading streaming (Which some users a complaining about)
this could be a huge opportunity for you, i'd definitely ping him