Are you aware of the new project from the Internet Archive?
Volunteers will be traveling around the United States in a high-tech bookmobile from which people can link to the download the book of their choice. Volunteers have uploaded about 9,000 public domain books on the site.
The bookmobile will be making stops at schools, libraries and other educational institutions. Interestingly, it will stop in D.C. on Oct. 8, the day before the Supreme Court will hear arguments in Eldred v. Ashcroft (the constitutional challenge of the Sonny Bono Copyright Term Extension Act).