Since I uploaded Notty to Sourceforge (get it from CVS), I thought it would be nice to show what it looks like nowadays.
It is mostly a working app, although still pretty basic. You can use it, you can create notes, you can even export them to HTML (working fairly well, except for links to other notes, which don't get fixed).
I am even using it to document itself (see docs/help.notty in the sources, it's a notty file)
Specially nice is Silvercity's code-block directive, which you can see used in the screenshot (look at the yellow fragment).
I'd say it is right now a pretty decent documentation writing tool, although the editor component is too featureless.