http://archive.org - digital library of free and royalty-free media including antique books and music for download
http://openlibrary.org/ - digital library with free ebook downloads / read online for out-of-print books, plus ebook lending
http://bookmooch.com/ -List books you want to trade, get points to 'buy' listed books from other members
World Masterpiece Theater - classic literature in anime format. Not well-known in the USA (they won't even put the dubbed ones onto dvd in English) but you can download fansubs.
Steal a banner ?