Listen up Sony Reader owners: you've got three days to change your ways. On December 11th, the eBook Store from Sony will be renamed the Reader Store with a new URL to prove it. In addition to a new store layout, the change also extends the open EPUB format to Sony's entire inventory of eBooks. In fact, any new electronic books will only be available in EPUB which helps explain the motivation for Sony's PRS-500 trade-in program. Sony's also making its Reader Library 3.1 software for Mac an
