From my email to Creative Commons:

Thanks for your recent answers to my questions, but I have just one more.

Is it possible to use a CC license, such as the Sampling Plus 1.0, only on the CD release of an album?

The reason I am asking is that iTunes for example is using a fairly strict DRM and a CC license could not be used there – but I do sell my works on iTunes.

Methinks that I should be able to release a CD under the CC license, do downloads from my site under the CC license as well, but let iTunes and other digital distributors sell the music without the CC license.