Yes (2x) and yes (2x).
If I have a choice, I always go for the more hackable hardware. I'm not hacker, but others are and kindly provide the interwebs with their wonderful exploits. My first ebook reader was a Hanlin V3 I bought and rooted some 8 years ago and. I dropped it this year and bought and rooted a Nook with glowlight. I'm in the process of making it see my usb keyboard. If I can manage it, I'll be writing outside in my garden.
Not to mention it reads anything I throw at it. From pdfs to saved pocket articles, epubs and mobis, DRM or non-DRMed files. But any reader now can read anything, if you use Calibre.