I was touched by the ceremony honoring Roberto Clemente between the fourth and fifth innings of tonight's game. If you don't know much about Roberto Clemente (and I'm not saying I know all that much myself) a great place to start learning more is this book excerpt from SI. (If you're not a subscriber, try bugmenot.) Or hit up a subscriber. Or find a back issue. Whatever. It's a worthwhile article.
The book it was excerpted from is here.