Sing a song of Sondheim
You never need an excuse to celebrate the genius of Stephen Sondheim, but here goes. We're still celebrating his 80th birthday (which actually occurred last March). He has a new book out, Finishing the Hat, Collected Lyrics (1954-1981) With Attendant Comments, Principles, Heresies, Grudges, Whines and Anecdotes (445 pages, Alfred A. Knopf, $39.95). A new DVD, Sondheim: The Birthday Concert, is out on Nov. 6. And toni…