Jean Valjean was still in the same place, motionless on his stone post.

Benzon, in responding to Peter Railton’s post here at The Stone, points out the limits of this metaphor and proposes the “chess board and game” instead. I prefer a simple host-parasite analogy.

Biz Stone, one of Twitter's co-founders, said in a blog post that more than 140 million messages are sent across the network each day; that's up to 1 billion every eight days.