Open-Access article more likely to be cited
A study just published in PLoS Biology concludes that open-access (such as the journals the Public Library of Science [PLoS] publishes) are more likely to be cited by peers. This model closely mirrors the well-known "Free Software" or "Open Source" model of software development by allowing anyone immediate access to results and the ability to quickly build on them.
Such a publishing model also, IMO, provides other benefits: more freedom, faster collaboration, fewer legal matters and a warmer, fuzzier feeling. It also helps avoids industrial/economic bias in science via concentrated publishing and funding models.