Lawrence Lessig weighs in on CC for software licenses:
Matt Croydon wonders about how CC licenses will interact with software. The answer is that they won’t. We share RMS’s concern that there is a proliferation of licenses in software. Our view was that there was a dearth for other creative content. Thus we start outside the software world. For now, at least.
I’m going to take that as an authoritative answer. Unfortunately, CC licenses are already being applied to software. The cat’s out of the bag. What do we do now?