As for collaboration, there are plenty of ways to adapt the lean startup model for music. Constantly releasing content and soliciting feedback is a smart strategy, and one more artists should adopt.
Their Songs, Your Way: the Rise of the Personalized Song
Cortney Harding

Absolutely. Iteration and user testing makes for successful products and services the world over, so why not adopt that model for music? Just wrapping up an article on this right now.