[ mona / prog / sol ]
For many years now I've just read on my laptop, so I'm not exactly aware of recent developments. Regardless I've heard good things about the Kobo reader for this. There is a large hardware hacking scene, and even by default it supports many DRM-free formats such as PDF, txt, epub, html, etc. In many locales Kobo out sells Amazon's Kindle e.g. 50% of market in Canada and France.