No Kindle support (though the web reader looks E-ink friendly). Amazon really needs to open up their SDK and allow you to write book-readers - they could grab a huge market if they did. As-is, they may be left hurting if they don't explicitly support this, especially if Google's claim of "the world's largest selection of ebooks" is accurate (and I have no reason to doubt it).
How about a research-assisting app, for text books? I wouldn't want the standard reading app to do what it would do, the extra UI elements would get in the way. And I wouldn't want to be stuck to a single one, there are multiple paradigms for different use-cases. So either clutter, or options-overload.
Similarly, from everything I've seen on E-ink devices, I could write a reader I'd be much happier with. For instance: half-page updates so one can speed-read without pausing between pages. Without the ability to do so, they're relying solely on their internal developers to make correct decisions for everyone.
I don't think they're gonna do it unless they give up DRM on their books. If third parties are allowed to write reader apps, then it would be almost impossible for Amazon to enforce DRM on its users.
amazon sells books, and let's you read them on any device, their own Kindle included. They would see that opening their device up to Google or others will reduce the amount of books that they can sell. It would be similar to Apple opening up iPods to Windows encrypted/DRMed music files.
