It feels as though Amazon wants to make reading ebooks in formats other than Mobipocket difficult, and even with Mobipocket, downloading a file from the Web requires non-intuitive steps. Adam explains ...

The upcoming update for the Kindle will bring this new support for the feature, and users will be able to open ePub files directly instead of the manual conversion done online.

The open-source EPUB e-book format is great for sharing books between different readers and making life easier on readers generally--but Amazon's Kindle, the big player, doesn't support it ...

Apple has also posted a support document offering advice on how to choose between ePub and PDF for a given document and outlining how to create an ePub file from a Pages document.