Last week I added this topic to the agenda for the DSpace Developers/DCAT meeting. I think it's imperative that we start talking about this sooner rather than later as this will have an enormous impact on immediate DSpace development as well as the DSpace Futures work.
I wanted to make everyone aware of a proposal that is making its way to the Whitehouse that could possibly have implications for open access repositories in the USA, including DSpace.
This proposal is being submitted as a response to the OSTP call for open access and preservation  to data and scholarly publications.  The publishers are making a big push to do it, and this is the Universities response.  What is interesting is that academic libraries (ARL) and Presidents of Universities (AAU) have come together to write this proposal.  They are proposing a federated network of currently established digital repositories with DPN(www.dpn.org<http://www.dpn.org>) as the preservation backbone.  That means they are proposing to use in many cases their current repositories, either DSpace or Fedora and implement common metadata and protocols so they can be aggregated.  One of the requirements of the repository is to have a PI identifier such as ORCID implemented.
If this proposal is accepted by the Whitehouse, the stakeholders of DSpace in the USA will need to come together to decide if and how it will meet the requirements outlined in SHARE.  We have a much higher probability of success to get the work done collaboratively and for all to benefit I believe, than working independently to satisfy the requirements outlined.
I would be interested in talking with folks further about this topic at OR13.  Look forward to seeing many of you there.