@farmerman,
farmerman wrote:'I shall be in no greater a discomfort than I was before I was born"
Yes. I guess so.
But being agnostic, while I don't know that there is some sort of afterlife awaiting us all, I also don't know that there isn't (and I fervently hope that there is).
And I suppose that for any one individual, "the possibility that the universe will suddenly cease to exist tomorrow" isn't much different from "the possibility that they will be run over by a bus tomorrow".
In any case, for the sake of whatever humans are alive when the universe switches off, I hope the wave of death travels at the speed of light, so they don't have a month or two to think about humanity's imminent extinction.
I just did a little reading to try to figure out whether doomsday will travel at exactly the speed of light or not (no luck figuring it out), and I stumbled across this on Wikipedia:
"The addition of gravity to the story leads to a considerably richer variety of phenomena. The key insight is that a false vacuum with positive potential energy density is a de Sitter vacuum, in which the potential energy acts as a cosmological constant and the Universe is undergoing the exponential expansion of de Sitter space."
http://en.wikipedia.org/wiki/False_vacuum
Sounds like the false vacuum could explain the 'dark energy' phenomenon that is causing the expansion of the universe to accelerate.