Can't believe I haven't linked to this before, but it is very worth reading: Removing the Barriers to Research: An Introduction to Open Access for Librarians by Peter Suber. If you like this, you might also enjoy something I'm sure I haven't posted "How and Why To Free All Refereed Research From Access- and Impact-Barriers Online, Now"
"The serials pricing crisis is now in its fourth decade. We're long past the point of damage control and into the era of damage. Prices limit access, and intolerable prices limit access intolerably. Every research institution in the world suffers from intolerable access limitations, no matter how wealthy. Not only must libraries cope by cancelling subscriptions and cutting into their book budgets, but researchers must do without access to some of the journals critical to their research."