Gospel of Judas

A Swiss group is publishing a translation of a text I've never heard of, the Gospel of Judas, which should make for interesting reading, though I doubt material attributed to that apostle will have much impact on Christian theology =) What intrigues me as a historian is why it exists and what we can learn from the fact of Judas material circulating in the early church.

Incidentally, the article is wrong, in that Mark and Luke are not attributed to apostles, but to, well, Mark and Luke, associates of Paul of Tarsus, who converted to Christianity after the Crucifixion.