If you’ve ever wanted to read such classics as “The Art of War”, “A Tale of Two Cities”, and many others, why not read them (for free) as .pdf files? Hell, if you have one of these, you can read them anywhere!
This discovery makes me want an eBook reader. The iPhone has apps that support eBooks, but I think reading from its backlit screen would grow tiresome.
Edit: There’s something really geeky cool about having an entire library of books at your disposal at any time.