A couple of non-Joshi scholarly items, noted as due for publication in 2012…
Green, Matthew (2012). “A Darker Magic: Heterocosms and bricolage in Moore’s recent reworkings of Lovecraft”. In: Alan Moore and the Gothic Tradition. Manchester University Press. (Forthcoming, 2012).
Weird Realism: Lovecraft and Philosophy. Zero Books, (Forthcoming, 2012). Seems to have been due since 2010, and “will deal with a small number of H.P. Lovecraft’s greatest stories” when it finally appears.