I don't think this applies to eBooks yet.
http://www.copyright.gov/fedreg/2010/75fr3863.pdf is the newest reference I found on the subject. It appears to be a law currently under consideration - one that they are trying to create specific definitions for. The text contained in the document is an "interim rule" until they sort it out. They also seem to initially be specifically focused on "online serials" meaning scientific/academic journals released periodically, numbered, and sequenced. It specifically says blogs and databases are excluded because their content changes daily. Sounds like newspapers would fall under similar exclusions. There is no mention of electronic books or a completed law.