I've just found out about this forthcoming volume on religious epistemology:
D. Lukasiewitcz & R. Pouivet (eds.), The Right to Believe: Perspectives in Religious Epistemology. (Ontos, 2012). Information about the book can be found here.
I imagine that several papers discuss skepticism; at least this one definitely does: "Scepticism and Religious Belief: The Case of Sextus Empiricus," by Renata Zieminska.
PS: Another paper dealing with skepticism is Fabien Schang's "Believing the Self-Contradictory."