It's hard to get into the boardrooms and offices of some organizations because the egos of the leaders take up way too much space. And some say that's good; it takes big egos to make things happens. Not so, according to Art Horn, an executive coach who leads a sales force development company. Just listen to what the people who work for these big egos have to say: "John is a smart guy and knows what he's doing, but his swollen ego keeps subverting...