I was looking at an article at LLRX.com titled, "Reviewing the XO “$100” Laptop". After reading the article I gathered some additional resources about this machine.
Here is the Wikipedia entry.
Video at YouTube of Brewster Kahle demonstrating the XO laptop as an e-book.
Another YouTube video: A Librarian Reviews the XO Laptop
YouTube video by librarian in link above: XO Laptop Ebook Reader Demo