Did it!
A macro shot taken around 3x life size with the Canon MP-E 65 macro lens.
This was actually a panning shot as I had to keep track of the snail as it foraged across the garden. It is surprising how fast they move when you are looking at them three times life size.
The snail was lit with a remote flashgun fired by Pocket Wizard and held above the snail by a voice activated light stand (my wife).