Sorry to hear about the passing of songwriter Dave Frishberg, who was also an accomplished jazz pianist and performer. Here's an obit in The New York Times.
Never met the man but I've long admired the sheer cleverness of his work. The song of his you probably know the best would be "I'm Just a Bill," one of several that he wrote for the Schoolhouse Rock TV spots on ABC Saturday morning. My favorite would be "My Attorney Bernie." Here's Mr. Frishberg singing it once on Johnny Carson's Tonight Show…and charmingly forgetting his own lyrics at the end…