If you’re tired of XML and verbose markup languages, the best readable (and writable) markup language I’ve seen is Markdown.
I’ve started using it as input format for drupal, and I’m considering whether it could compete with docbook when it comes to writing technical documentation. What do you think? One big feature that markdown has over docbook is that it can be parsable in realtime (on web). Doing XSLT on docbook is really taking CPU and time.
I also would like it as a input format for Dokuwiki, but could not find any stable available module.
BTW: Textile looks terrible – I don’t understand it, do you?