You really need to have grown up when Sartre was in full cry to appreciate it, but this New Yorker piece is still pretty funny: Jean-Paul Sartre's Blog. The first post:
Saturday, 11 July, 1959: 2:07 A.M.
I am awake and alone at 2 A.M.
There must be a God. There cannot be a God.
I will start a blog.