I've recently joined a new group blog, the purpose of which is to consider various arguments for different views of church authority.  More specifically, my coauthors and I will be looking closely at Orthodox (and Catholic) arguments against Sola Scriptura.  Obviously attempts will be made at refuting these arguments, but the primary goal of this blog is to foster communication between Protestant and Orthodox Christians, and to work towards an increasingly charitable and transparent dialog between the two.  This blog is called "By Whose Authority?" and it can be found here.