ALWAYS SAVE YOUR WORK: I mentioned this post about the Nanog gene and radical life extention over at Setting the World to Rights before, and I wanted to put the link up again because the comments are rather interesting.
One commenter says that once we can create backups of ourselves death will not be permanent, but this is intuitively fallacious. Creating copies or backups of oneself clearly would not obviate death. Another commenter pointed out that a copy would be no different than an identical twin, and wold not really be you, even though they might be just like you.
Even if the copies are fungible to other people, you yourself would still be dead. Same goes for transporters in Star Trek.
Addtionally, I don't expect that we will never be able to back-up a human.