Readers and researchers looking for hard-to-find books now have the opportunity to dip into the collections of one of the world's most comprehensive libraries to purchase digitized copies of public domain titles. Through their Digitize-on-Demand program, Kirtas Technologies has partnered with The New York Public Library to make 500,000 public domain works from the Library's collections available (to anyone in the world)"
http://www.kirtas.com/index.php?option=com_content&view=article&id=79:new-york-public-library-and-kirtas-technologies-partner-to-make-500000-public-domain-books-available-to-the-world&catid=6:news&Itemid=70