Development of Creative Commons licenses

[Guy Johnston <guydjohnston AT googlemail.com>]

Hi, I was thinking it might be a good idea if extra options could be added to 
the
sharealike/copyleft licences, to allow derivative works to be licensed under 
certain other Creative
Commons licences. I've licensed some music under the BY-SA licence, but I'd 
also like to let people
make derivative works which are licensed under the BY-NC-SA and BY-NC-ND 
licences (and probably
others). At the moment, I can allow this for the BY-NC-SA by dual-licensing 
my work under both
licences, but not for any of the others. Does anyone else think that would be 
a good idea?

Thanks,

Guy

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