True potential of the Kindle.
when I started reading e-books it was on a 2MB monochrome Palm (great in sunlight) & I tended to roll my own books by reflowing & converting the .TXT files from Project Gutenberg.This was great for the time but nowadays you can buy e-books or get loads of Public Domain stuff free gratis& for nowt.
All you need is to get is the open source Calibre from http://calibre-ebook.com & pretty much any flavour of e-book reader, even a DRM encumbered Kindle.
Because Calibre will do all the conversion for you so seamlessly, it will also get & format loads of stuff from the web for you to read later on your e-reader.
I have the Linux version of Calibre on a Ubuntu Netbook but you can also download a Windows version. You can then connect via to say a Kindle over USB & transfer your free books by the yard. As well as maybe occasionally buying the odd book. Amazon is truly not the only fruit for a kindle.