January 1, 2010 is Public Domain Day, according to the Open Knowledge Foundation. And on January 1, the works of 563 authors will enter into the public domain! See OKFN's public domain database. You can change the year on the end of the url to see list of public domain works for other years or search/browse by person or work. Pretty cool. Some of the more famous authors whose works will be released to the public domain include Sigmund Freud, Zane Grey, Sidney Howard, Ford Hermann Hueffer (aka Ford Madox Ford), Edward Sapir, Constance Lindsay Skinner, and William Butler Yeats.

[Thanks Open Knowledge Foundation!]