It has been claimed on this site that the fundamental question of rationality is "What do you believe, and why do you believe it?".
A good question it is, but I claim there is another of equal importance. I ask you, Less Wrong...
What are you doing?
And why are you doing it?
What about "living forever"? According to Eliezer, this has infinite utility. I agree that if you assign it a finite utility, then the lifespan dilemma fails (at some point), and similarly, if you assign "heaven" a finite utility, then Pascal's Wager will fail, if you make the utility of heaven low enough.