I saw something on the discovery channel that scientists are able to extend the lifetime of basic organisms by threefold. They do this by "blocking" the freeradicals of aerobic respiration. They are currently trying to get it passed so they can start administering this to humans, but obviously it could be a touchy issue.
Just thought I would share that.
I honestly think though that people would actually like the idea of living longer. I mean extending the lifetime of an organism...that isn't breaking any ethic lines....right?