Following a report from yesterday indicating that the iBookstore would offer most titles on The New York Times best sellers list for $9.99, App Advice is now reporting that the iBookstore will also feature a vast number of free titles from Project Gutenberg. Project Gutenberg is a volunteer organization that digitizes and catalogs books which have seen their U.S. copyright expire; the Gutenberg website claims to offer over 30,000 ebook titles for…