Do you want to live forever?

This weekend, I watched a fascinating Channel 4 programme with this title. It was all about the breathtakingly radical ideas of a Cambridge biomedical gerontologist called Aubrey de Grey who believes that, within the next 20-30 years, we could extend life indefinitely by addressing seven major factors in the aging process. He describes his work as Strategies for Engineered Negligible Senescence (SENS).
Aubrey de Grey looks like a modern-day Rasputin and sounds like a messiah – but this does not make him wrong. In September 2006, Peter A. Thiel, co-founder and former CEO of the online payments system PayPal, announced that he is pledging $3.5 million “to support scientific research into the alleviation and eventual reversal of the debilities caused by aging.” The gift will go to the Methuselah Foundation, at Springfield, Virginia, USA, a nonprofit organisation started and run by de Grey.
In the meanwhile, you can check out the scientist’s web site here.
Of course, the science of this debate is beyond me, but I have no doubt that in time science will find ways to extend life significantly. What is special about de Grey is that he is convinced that in principle all the functions of the body and the mind can be replaced to enable those who wish in effect to live forever.
Whatever the scientific issues this possibility raises, there are of course profound ethical and social issues. If you could live forever, would you want to do so? If not, how long would you like to live? How would you decide how long your life would be? If humans could live indefinitely, would people still have children? If so, could the Earth sustain such a growing population? If not, what are the implications for society of an endlessly aging population?
Please post your answers below.