In July of this year Continuum published a book on Paul’s cosmology which includes a chapter by Joel White touching on Galatians.
Joel White, “Paul’s Cosmology: The Witness of Romans, 1 and 2 Corinthians, and Galatians.” In Cosmology and New Testament Theology. (Library of New Testament Studies). Edited by Jonathan T. Pennington and Sean M. McDonough. London: Continuum, 2008. 90-106.
Needless to say it is too rich for my blood but I did order a copy of The Galatians Debate that I mentioned yesterday.