The journal E-Learning and Digital Media (Vol 10, no. 2) has Open Educational Resources as its theme. The articles look thoughtful and interesting. The introduction (by Markus Deimann and Norm Friesen, giving a preview of the articles) is free, though, and worth reading. See here the issue contents for the Journal of E-Learning ISSN 2042-7530 Volume 10 Issue (2013).