Privacy rights of biopic characters

Boston lawyers Mark Fischer and Franklin Levy have posted an interesting article titled Privacy Rights and Celebrities: Truth, Fiction and Biopics on the DuaneMorris website. They ask:
How much can real people be fictionalized in the movies? Two recent films make that point—The Social Network and All Good Things. Though these movies often blend truth and fiction, the legal implications that can result are very real. This article will examine the privacy rights of those public figures whose lives are portrayed before the camera and in the written word. What legal defenses are available, and what is the likelihood of a favorable outcome for the real people in these cases?