Hi, I think full screen mode would be a nice enhancement: in this mode the editor takes over the whole monitor: no windows, no scroll bars: nothing to distract you: just you and the text (constrained to some inset from the monitor frame).
I find this is a nice environment to get work done in.
I've been doing some writing the last week that I was putting off doing: easy to be distracted when it is unpleasant work... anyhow: I found while I couldn't write the paragraphs I needed in textmate, I could in macjournal
<a href="http://homepage.mac.com/dschimpf/">macjournal</a>
So, if full screen is already an option... Please someone point it out to me :-) Else, this is my suggestion.