This license would help those genres of music that rely heavily on sampling which have been getting a beating recently by record company lawyers.
It starts to get a bit sticky when one begins to explore some of the extremes of what are called "moral rights". In the article 6bis of the Berne Convention, the "moral rights" of authors includes the "right of integrety: mutilation or distortion that would prejudice the author's honor or reputation is not permitted." These rights are not protected under US Copyright Law but many countries elsewhere protect this. The question is, when does a remix "prejudice the author's honor or reputation" and do the Creative Commons licenses allow people to use the works in ways that "prejudice the author's honor or reputation".
This is where The Kuleshov Effect comes in. danah boyd blogged about it today. The Kuleshov Effect is when an image is perceived very differently depending on what other content is juxtaposed with the image. The question that danah raises is, how much control should / can an artist have of the context in which their material is used? How much of this should be made explicit in the Creative Commons licenses and should there be a waiver of these "moral rights" in countries outside the US where such rights are actually protected.