There is a great ted lecture on this subject. I thought he did a good job at addressing the concerns. At least to the point of defending that research should continue to at least allow future generations to decide if they think it is acceptable.
http://www.ted.com/talks/aubrey_de_grey_says_we_can_avoid_aging.html
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.