There's no question in my mind that we'll figure out the aging thing, and probably sooner rather than later.

Then the ethical questions will arise - e.g. "will only the wealthy be able to afford it?", "what happens to the world population if the birth rate doesn't go to zero?", etc.

Update: the Mars Trilogy novels deal with this issue nicely, including what could happen to your mind as you live longer. They're very good too. :) http://en.wikipedia.org/wiki/Mars_trilogy

This is a pretty interesting idea. My wonder, however, is what this 'rejuvenation' has in store for our mental age. If we bring the physical body back to 30, but the mind stays at 60 we might not want to live that long.