I haven't read through the entire 7 pages of this thread so this may have been mentioned already, but regarding leaving your body to "medical science", it sounds like a great idea for allowing new medical students to study the human body - then I remember some years ago the car company, in Germany I think, that was using human bodies donated to medical science in place of crash test dummies in simulated car accidents.
I'm sure the knowledge they gained was useful, but somehow thinking of my body being thrown though the windscreen of a new model BMW or Merc just turns my stomach :-(