Last night there was a talk on the Shroud of Turin at my parish. It was very interesting and there is a Holy Face of Jesus prayer group forming at my parish. I learned alot about the physical nature of the Crucifixation, for instance, the crossbeam would have been tied to Jesus' arms, across his back, with one loop of rope tied to his ankle, and one to the people in front of him. More info at Holy Face of Jesus.