QUOTE (Sengir @ Mar 29 2010, 11:16 PM)

Ah, that's what you meant. Electrolytes of course do become depleted, but how much energy do you want to put through there to achieve that before the body starts to fall apart?
In absence of shielding (it's meant to be cheap), accounting for the high resistance of electrolytes as a current medium, you'd probably need to push a fair amount through it for any reasonable cable distance. I don't have numbers on me, as I have never inquired into the resistance of dead skin or its salt and water content. In fact, I'd be happier never needing to ask such questions.
But I also wonder why you are so certain that dead skin would decompose so rapidly. You already need to seal it in an insulating cover and provide metal contacts on each end. It wouldn't be difficult to heat the skin to slow decomposition as part of the process. You could use it to seal the contact-"cable" interface airtight as well. Of course, the fact that organic chemicals are readily decomposed by organisms does mean that the proposed cables do have a short lifetime either way - laying cable is pretty labour intensive.