Originally Posted by doctorow
I disagree. ePub is not the holy grail. It would be nice if we could have one file format for all e-book purposes, but this is not how it is. Some content (in particular textbook content) is heavily designed around a particular paginated representation, and may not make sense to recast in a "liquid" representation. Digital publishing is not just about linear texts such as novels. And printing is not going away any time soon, either. The preferred representation for many books, magazines, and newspapers will remain high-fidelity PDF.
But if Amazon had brought ePub onboard and then told these companies that in order to sell your product to work with the DX, you need to make ePub, then there's a chance that would happen. I'd rather have ePub text books then Mobipocket text books for one.