Maria Bonn has published "Maximizing the Benefits of Open Access: Strategies for Enhancing the Discovery 0f Open Access Content" in College & Research Libraries News.
Here's an excerpt:
To achieve some economies of scale in library acquisition of OA publications, we should leverage the library crown and work the library network. There's no point in libraries all over the world laboriously replicating the same work of evaluation, selection, and acquisition when they have the tools, methods, and community to work in collaboration. Subject specialists might organize themselves in clusters to share the initial work of discovery and establish criteria for evaluation that can be collectively trusted