Per their website, four volumes of the Open Astronomy Journal have been published so far, one each for the years 2008, 2009, 2010, and 2011.
The first volume contains two "General Articles"; the second, 16 such papers; the third, nine; and the fourth also nine.
There are altogether four "Special Issues", two each for 2010 and 2011.
The first, Special Issue #001, 2010, is entitled "Dark Energy and Modified Gravity". It has eight papers, and an editorial. The second, Special Issue #002, 2010, is entitled "New Highlights in Gravitationally Lensed Quasar Research", and contains four papers (and an editorial).
The third, Special Issue #001, 2011, is called "Gravitational Waves: A Challenging New Window to the Universe", and contains eight papers (plus the editorial). The last, Special Issue #002, 2011, is called "Some Initial Thoughts on Plasma Cosmology"; it has four papers (in addition to the editorial).
Three of the four Special Issue editorials are by members of the Editorial Board; the exception is Special Issue #001, 2010 ("Dark Energy and Modified Gravity"), which has an editorial by S. Nojiri and S.D. Odintsov. The editor of the third (Special Issue #001, 2011, "Gravitational Waves: A Challenging New Window to the Universe") is the OAJ's Editor-in-Chief, Dr. Christian Corda.
My impression is that Special Issue #002, 2011 ("Some Initial Thoughts on Plasma Cosmology") is out of place in this journal. Why? Well, for starters, it would seem that the papers in this Special Issue have not, in fact, been through peer-review, unlike those in the other three Special Issues, and unlike the General Articles.
Does any reader share my impression?