I just heard today that Madeleine Scopello's book which contains the proceedings from the 2006 International conference on the Gospel of Judas held in Paris has been published. It is a Brill volume, so pricey and probably a library loan book for most of us, but it is very important publication because it contains a wide range of scholarship on the Gospel of Judas - first ever glimpses at what scholars world-wide are thinking about the Gospel of Judas. The paper I wrote that inspired The Thirteenth Apostle is in this volume, as well as significant pieces by John Turner, Louis Painchaud, and many many others. I don't have the final contents list on hand, but it was a great conference with great contributions.
The book is called The Gospel of Judas in Context: Proceedings of the First International Conference on the Gospel of Judas (Nag Hammadi and Manichaean Studies; Leiden: Brill, 2008).