Thinks that, from my point of view, can create an even better experience.
* 1.5 space between paragraphs.
* Backspace sound.
* New line sound.
* Space sound.
* 80 character wide.
* Slightly different sound per key (or row of keys).
* Easy to remember domain.
Then things that I am not so sure, but as long as don't change the interface, could be cool.
* Ctrl-C copy all the text without the need of selecting text. (Probably require flash).
* Ctrl-Shift-C the same but copy the result of markdown the current text (so html is actually copied).
* Selecting text automatically copy the selection to the clipboard.
Things that I will like to play with but don't sure if they are usefull.
* Page simulation. 80 char + margin in white, with proper paper texture, and back background.
* Go for fullscreen on load (if possible), and fallback to show a small, only onmousemove fullscreen icon.
On any case. Really. I really like it. Love to be able to have a webdav (basic auth) interface and could install on my own server. So i can add files just by changing the url, and access that files later through ssh.