We do a slug and snail harvest most evenings, and they get launched into space with an old barbecue fish-slice (nice and springy) to find new homes at the end of the field at the bottom of the garden.
I've had great success with mine by keeping them in half barrels with three bands of copper tape round, works a treat for me!
Here's some from last year
http://i791.photobuck...97/D97x7/S1053325.jpg
This year they are even bigger and totally untouched be slugs or snails.