I found a free piece of software that will help you convert non-DRM .pdf, .doc (Word) and other types of files for Macintosh users. It seems to work pretty darn well. Depending on how your original file is structured and graphic content, it can work just like a "native" developed e-book! Check out link below for the company and software. Again, it's free, so if you have existing files, you can't beat it. Best I've found so far.
Anyone else have other or better solutions?
http://www.lexcycle.com/
Thank you,