Neil Chue Hong has self-archived "Where Does It Go from Here? The Place of Software in Digital Repositories" in the Edinburgh Research Archive.
Here's an excerpt:
The open repositories community has made great strides in recent years in addressing interoperability, policy and providing the arguments for open access and sharing. One aspect of open research which has come to prominence is the importance of software as a fundamental part of reproducible research, which in turn raises issues around the preservation of software. In this short paper, I will describe some of the work that the Software Sustainability Institute (SSI) has been doing to address the structural and policy issues which currently present a barrier to the deposit and use of software in open repositories.