Being new to the forum and new to having an e-ink reader, I thought I'd point out a freebee. I used the comiclrf converter to convert the CBR file of the graphic novel Cory Doctorow's Futuristic Tales of the Here and Now into Sony Reader LRF format, and Cory made it available here:
http://www.archive.org/details/CoryD...fTheHereAndNow
I also converted it into the EPUB format, but for some reason the conversion software put a thick white border around every page, lowering the resolution and making it more difficult to read than the LRF version.