This isn't entirely on the subject of the OP, but its certainly relevent to the immortality argument the OP spawned.
People need to embrace death. Knowing that your time here is limited and you, as a human, mortal creature, are subject to accidents, illness, disease and eventual non-existence should compell you to live life to the fullest while you have the chance.
I mean, imagine the procrastination and eventual complacency that would abound if people really thought they would live forever! You would have no sense of urgency, no sense of compulsion, and no sense of "living in the moment".
Personally, Western Science and its obsession with defeating death sickens me. Cloning is just another attempt to defy the natural order of things really. I don't want to endorse human suffering per se, but really, disease and illness is an important part of life. It culls the weak, keeps the gene pool clear and clean and generally, as I addressed earlier, makes us appreciate the life we DO have.
Sorry about the rant, but damnit, there are way too many people and most of them drive me nuts. Anything that keeps them alive LONGER just pisses me off.