lol. Tovarish
No, not rooted yet:
1. 'cos it's a little risky.
2. root by itself doesn't give new features. At this time I'll probably able only to add custom fonts, replace bootanimation and so on. Nothing really interesting.
3. So I need some help from geek with advanced knowledge of linux\android.

Currently I'm looking at the browser app code to understand how interaktion with e-ink works. There about 70 files so it will takes time.