Project Gutenberg's anabasis
There are lots of pretend eBook operations, but none of them produce all of their eBooks themselves, or have 10,000 of their own eBooks that can be read by virtually any text reader and word processor

The next big step, after we have reached a million eBooks, will be to translate each of them into as many as 100 languages, thus making them available to an even larger audience.

Regarding the number of titles in the public domain, during the 20th Century, there were many years in which over 50,000 books were published and the rate has been increasing throughout. Certainly there were a million titles published before 1923 that we can get our hands on, not to mention

non-book items such as newspapers, magazines, brochures and advertisements, court records and other government documents, unpublished manuscripts and diaries, music, film, photographs, audio, and other art forms.
-Michael Hart interviewed by Sam Vaknin/UPI Jan.07.04