Thanks to Richard Beck of Experimental Theology, I learned of David W. Congdon and his blog The Fire and the Rose (an allusion to T.S. Eliot).
David has written a series of posts on universalism indexed at Why I Am a Universalist. He also maintains a resource page of the posts of others titled Universalism in the Blogosphere.
Whereas Richard Beck writes primarily from a pyschological perspective and Keith DeRose writes from a philosophical perspective, David Congdon writes from a theological perspective.