This looks like a promising journal, covering educational aspects of various media including games and simulations. In fact, the Fall 2007 issue is devoted to educational gaming! The introduction to the issue lays out the various issues relating to educational use of games in a very readable fashion. For interested educators, this issue is well worth the read!
It is a publication of the Association for the Advancement of Computing in Education, so the educational focus is paramount, unlike many other journals and sites devoted to aspects of games, simulations, and virtual worlds.