I watched a little bit of The Addams Family - Volume One recently out on DVD and I am very impressed with the quality of the picture and the quality of the commentary. There is an on-camera interview with John Astin and other great special features including details about the creator of The Addams Family in print, Charles Addams. It's going for a great price that is worth every penny.
You may also be interested in the new and first Charles Addams biography by Linda H. Davis. NPR interviewed her recently.