[Morgeruat]

a western I read once had an interesting method, a man was staked out in the sun spread eagle, covered in honey (especially his "sensitive areas") and left for the fire ants, one of the first things to go was his eyes.

I also have a softspot for an ancient chinese torture, tying a man spread eagle over several bamboo trees (I'm not sure what they're called and I think shoots is just for the immature form), then sharpen the bamboo, it grows quickly enough that it will actually grow upwards through the person you tied up, piercing him in several places and continuing through.