Sarah Cooney-Mcquat, Stefan Busch and Deborah Kahn have published "Open Access Publishing: A Viable Solution for Society Publishers" in the latest issue of Learned Publishing. The paper is open access.
Here's an excerpt:
The open access (OA) business model has established itself as a viable alternative to traditional subscription-based publishing and is an option that societies should now realistically consider for their journals. This paper outlines how the OA model can work for societies, and presents a number of case studies that demonstrate how it is already working in practice.