The couple commissioned a comic artists friend of theirs (at http://www.viruscomix.com/subnormality.html) to create a picture of their wedding party. The wedding photographer then had everyone recreate the pose. I think it was done very well.
My hubby and I got married at the Atlanta Zombie Walk Sept 26, 2010. We then shambled off into a life of wedded bliss followed by an umbrella toting horde of the undead.