Richard Poynder has published "Q&A with CNI's Clifford Lynch: Time to Re-think the Institutional Repository?" in Open and Shut?.
Here's an excerpt:
Moreover, today we can see that the interoperability promised by OAI-PMH has not really materialised, few third-party service providers have emerged, and content duplication has not been avoided. And to the exasperation of green OA advocates, author self-archiving has remained a minority sport, with researchers reluctant to take on the task of depositing their papers in their institutional repository. Given this, some believe the IR now faces an existential threat.