ICPSR is one of several organizations which are participating in "Round #2" of the DuraCloud pilot. This phase of the pilot begins in September and runs through the end of the calendar year.
I had missed two earlier webinar sessions on the technology and the pilot process, but read through the slides and listened to the audio today. It really looks like DuraCloud will be an interesting project. In brief it is essentially an abstraction layer on top of multiple cloud storage providers, and also implements a series of services, such as a bit-integrity checker.
For our participation I think we'll use our archival content, but nothing that involves any level of confidentiality. So fair game would be previous (and current) versions of public-use datasets and documentation files (codebooks), and perhaps snapshots of study-level metadata encapsulated in DDI XML.
If the pilot goes well and DuraCloud looks like an attractive service for making additional preservation copies of materials, a future project might be to design a system for encrypting our more sensitive content so that it too could be placed in cloud storage.