The journal E-Learning and Digital Media (Vol 10, no. 2) has Open Educational Resources as its theme. The articles look thoughtful and interesting, but unfortunately it's a priced publication that my university doesn't subscribe to. The introduction (by Markus Deimann and Norm Friesen, giving a preview of the articles) is free, though, and worth reading.
Photo by Sheila Webber: Wood anemone, April 2013