On the discussion of morals, evolution, and cooperation, my POV is closer to Jaitea's than twister's, I'm afraid. I don't believe that morals will disappear. I do believe that they could be drastically different. In fact, as cooperation is what has allowed our species to endure, and as our present set of morals involves much individuality, I could easily see a future set of morals in a completely godless world where the needs of individuals are entirely subservient to those of the whole of humanity. My earlier example of the man who is a drain on society because of his terminal condition is a fine example. In a much more cooperative society, he would be allowed to die for the good of humanity as a whole.
Yes, I'm afraid that morals would remain as strong as ever. They would simply be different from today, with the above example a potential logical conclusion. You see, without God, there is no right or wrong. I'm sorry, but this is an absolute truth. There is only a perceived right and wrong, something which will oscillate over time, especially if we were to lose the rigidity of religious conviction. But even if the future portends morals we find horrific today, they will be no more right or wrong in their time....again, without God dictating.
The morals you enjoy today were passed down by Judeo-Christian culture, even if you don't like what those religions believe. In reality, atheists' morals are only a slightly modified version of the set that the Judeo-Christian God already gave to mankind.