1) It is possible and does already work implicitly. It's just not restored at start-up (restoring that would slow it down).
2) Not in the current implementation, but there are plans to change this.
3) No, or not yet. But there are the "system- and software-notes" features which you can customize the way you like through an HTML5/JavaScript 'template'.

A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]