a couple of ideas I've been tossing around are encasing the corpses of participants in concrete and building an artificial reef (would need a lot of participants obviously). Another that also appeals to me is putting my body on display in a tank of hagfish. How cool would that be!?
Oscar Wilde said that fox hunting was 'the unspeakable in pursuit of the uneatable'.
I think your hagfish idea is 'the unspeakable in consumption of the unfortunate'. It has put me right off the idea of burial at sea because I remember with disgust the hagfish sequence in one of David Attenborough's series. Back to 'bake and shake' at the crematorium
Alan