Is there any way to add an ePub book to iBooks without iTunes? I purchased a book and have it in ePub and PDF formats. I can easily add the PDF to iBooks from Safari. However, I can't find a method to get an ePub book into iBooks without iTunes. I'm away from my laptop with iTunes where my iPhone syncs, so that's not an option at the moment.

Is there anyway to add an ePub book to iBooks without iTunes?
If you email the epub file to yourself, opening the attachment in iBooks will be an option in iOS Mail.