It's like some vast aerial city with people walking briskly to and fro on catwalks, carrying picnic baskets full of nutritious snacks and puppy smoothies.
My advice to anyone who is curious about becoming a contributor—and who is better than I am at keeping his or her contributional compulsions under control—is to get Broughton's Missing Manual and start adding, creating, rescuing. I think I'm done for the time being. But I have a secret hope. Someone recently proposed a Wikimorgue—a bin of broken dreams where all rejects could still be read, as long as they weren't libelous or otherwise illegal. Like other middens, it would have much to tell us over time. We could call it the Deletopedia.