Ok I may not have iPhone but some of my readers might have :), anyway I just want to share you this application that I saw in my Google Readers.
This is applicable to iPhone/iPod touch only: The program aim to convert iPhone as PDF Reader, Stanza is a free and fantastic ebook reader for your iPhone.
The free application comes pre-loaded with several sources for downloading free or public domain books (including the entire Project Gutenberg library), so you can easily download books like The Art of War, The Complete Works of William Shakespeare, or Walden in just a few seconds without spending a dime.
You can also purchase new books, Stanza comes with a bookstore with which you can purchase popular new titles as well. Prices range from $8 to $15 based on the books.The reader itself is fully customizable, so if you don’t like the standard black text on white background look, you can just as easily pick something that suits you. Stanza is a free download for the iPhone or iPod touch.