You had me at "non-HTML-based" ;)

I've been looking for a simple word processor that will let me easily/quickly do basic things and which will let me export to markdown and HTML that isn't terrible like the type word processors create.

I recently found wordgrinder (https://github.com/davidgiven/wordgrinder), which is a terminal-based word processor that's very close to what I've been looking for. A wx-based thing like this might be a bit nicer. So I'll start with one suggestion: support for wordgrinder's .wg format would be real nice :)