There is the bebook, lbook, hanlin v3. These are all the same system, based on open source components. They read many open formats, plus doc, pdf, chm and even

There is the bebook, lbook, hanlin v3. These are all the same system, based on open source components. They read many open formats, plus doc, pdf, chm and even DRM'd mobipocket files. I am surprised that they are not more widely known. They are not exactly cheap if you live in the US, that's because of the low dollar and the high cost of the e-paper screen, I think.