Speaking of e-ink devices, is there a more-open equivalent to the amazon/kindle ebook store? Some site you can use to legally purchase and download ebooks for non-kindle devices? Or can you do that via Amazon now?
Google Play Books is pretty good on any device that runs it. You can also upload your own ebooks quite easily (and then sync progress/annotations across devices), which is great for my collection of .epub files that mysteriously fell off a truck...
This seems to depend upon the author/publisher more than anything else. It also seems to heavily depend upon the type of book (e.g. DRM free computer and science fiction books seem to be the most common). Even when you do find a store that sells DRM free ebooks, you have to be careful about buying books that are labelled as such.
Kindle is probably not the best choice for DRM free books since ePub and PDF are the dominant formats (outside of Amazon).
You can download books from the Kobo store. Most of them use Adobe Digital Editions DRM, which is trivial to remove using calibre, but some are DRM free.
