Weiner was especially pleased that Barnes & Noble decided to support an open e-reading format known as e.pub, sponsored by the International Digital Publishing Forum. With that, he said consumers have a wider range of choices than with the Kindle, which supports it's own proprietary .azw format.

Only the Kindle DX supports PDF files, he noted, pointing out that users can borrows books from public libraries with digital lending programs, but the vast majority of those libraries support both e.pub and .pdf.