If you attended public school in the United States between 1973 and today, odds are you've heard Dave Frishberg's songs - just see if any of these Schoolhouse Rock classics ring a bell: "The Number Cruncher " "Seven Fifty Once a Week " "Dollars and Sense " "Walking on Wall Street " "Hardware " and, of course, the classic "I'm Just a Bill." Of, course, Frishberg is much more than the writer of beloved civics-minded ditties - he's also the brilliant...