The AV Club has a great article on The Star Wars Holiday Special!  There are quotes from writers, all sorts of trivia, and the usual enjoyable commentary.   “…And Introducing Chewbacca’s Family!” Case File #30: The Star Wars Holiday Special" looks into what could've been interesting and winded up as the saga's first and really only official "let's bury this under the rug" moment.

Do check it out.