What about unnatural causes of death, such as cancer and other diseases? The above article addresses some unnatural causes of death and potentially very promising cures.
Come to think about it, is not conscious man's nature to solve and control nature in this way. The only living species able to know/understand nature in order to control nature. Why? To benefit himself, his family, loved ones and humanity.
Click here to read the article that explains progress being made on achieving escape velocity. The culture of technology Death be not proud
You actually want people such as hippies to live forever? :-)
Wait, if the nanoshell mice were cured, why only 2.4 days better than the cancer mice? Something don't add up.
Amazing stuff
The rest of your point not withstanding, cancer and other diseases are natural causes of death.
Cancer and disease are natural processes unless caused by man. The vast majority of disease is naturally occurring. Even man caused disease would be a natural reaction to a man related stimulus.