Here, we find my-penis.org's scrotum page. It includes anecdotes, facts, and speculation, as well as links to pictures of the scrotum in some of its many states. The pictures really don't show much sack, though. I think they're mostly there so people can get a wank. I must warn, also, that the advertising is of a sexual nature, so if you're working in a daycare center or something, don't click that link just yet.
Three more days to submit scrotal icons!