As reported on David Bigwood's catalogablog, the Text Encoding Initiative has released a collection of articles titled Electronic Textual Editing. Many of these articles are case studies but the collection also includes a section on practices and procedures.
As pointed out in this Slashdot posting, the results of Google's Print initiative are starting to appear in search results. Try searching for "book moll flanders" to see it in action.
However, even the scanned versions of works clearly in the public domain have "Copyrighted Material" printed down the right edge of pages... what the?