I think it's a excellent system and I'm thinking to apply it to the Village Music Project transcriptions at some point in the not too distant future, to make sure that the hard work of the transcribers doesn't go unmentioned when people use their work in recordings etc.

I would also use one of the license types for streaming field recordings that I want to protect but still want to give people access to.

All in all it seems to be a well thought out and flexible system.

http://creativecommons.org/

J