Who's to say that if you were able to imitate all of the synapse in your nervous system and transfer all of the electrical activity instantaneously to analogous, artificial neurons in a fashion that resembled normal nerve conduction that it wouldn't actually BE you?
Nerves pass signals all the time, what if the "hand-off" were to a machine? It's hard to imagine it ever working since everyone's outlook is colorized by their physical vessel, but I don't think it's entirely unrealistic.
Say it were possible, it brings up other ethical considerations: does one's soul (if you believe in it) transfer with electrical activity? Are we really any more than the sum of our electrochemical brain activity? Would humans, psychologically, ever be able to deal with a lack of a body or one that wasn't really theirs?
Cool link, Steel.
Edit: Another interesting point on the last page of the article.
Would anyone here choose to die if lifespans were extended indefinitely? Essentially would anyone decide to simply let nature take it's course or give mother nature the bird and plan on living forever?
I fall into the second category.