Originally Posted by wallcraft
Sony is already supporting ePub via Adobe Digital Editions. One advantage of the Kindle store approach is that Amazon could support ePub at any time, since they only need to get it working on one device type and ePub could be provided side by side with AZW (MOBI). They already do this with TOPAZ ebooks (which are a pathetic attempt to provide an alternative to ePub). I doubt they will do this, but if they do the reason will be the textbook market. MOBI and TOPAZ are simply not good enough for technical ebooks.
A problem with ePub is that it takes a lot of resources to display correctly. So it will be interesting to see how well FictionWise is able to render ePub on (say) Palm handhelds. One option would be to bundle an ePub and an eReader version of the same ebook, with eReader being used on the less powerful devices. The eReader version would be generated by FictionWise from the publishers ePub.
Which makes the ePub under this scenario, not a 'standard' as Zelda is promoting.