Request for input: archiving and licensing software

"Behind a scientific finding, in addition to unique data, there is often unique software. If Dryad archives data in part to allow others to validate the findings reported in the literature, then should we not also enable researchers to archive the software that was used to process, analyze and, in the case of simulations — create those data? Some users have already deposited software source code alongside their data....If users are willing and able to release their code under a CC-Zero waiver, then there is nothing stopping this practice. In fact, Creative Commons and the Free Software Foundation have recently stated that CC-Zero is appropriate for release of software to the public domain....Yet, a number of journal partners and users have requested that Dryad provide more, or different, options for software, and that authors should not be required to waive legal rights with CC-Zero...."