Ben Horowitz is probably the only management guru (I'm sure he'd hate to be called that) who uses rap lyrics as epigraphs. Certainly, he's the only tech management guru who does. And yet "guru", in the tech/geek sense, is precisely what he is: sharp, knowledgeable, the go-to guy of tech management. He and Marc Andreessen are co-founders of the new tech venture capital firm called (what else?) Andreessen Horowitz. The firm's domain name is A16z.com (get it?).