I can't remember the book, but [Albert-L%C3%A1szl%C3%B3_Barab%C3%A1si](http://en.wikipedia.org/wiki/Albert-László Barabási)[^] has written extensively about networks, specifically scale-free networks. In any natural network were the nodes are distributed unevenly, there are always what are called 'super nodes', in an average case around 10% of nodes connect to 90% of all the nodes. In a human network, if you can connect to a super-node you suddenly have a huge network.
Panic, Chaos, Destruction. My work here is done. Drink. Get drunk. Fall over - P O'H OK, I will win to day or my name isn't Ethel Crudacre! - DD Ethel Crudacre I cannot live by bread alone. Bacon and ketchup are needed as well. - Trollslayer Have a bit more patience with newbies. Of course some of them act dumb - they're often *students*, for heaven's sake - Terry Pratchett