Since I deployed DokuWiki last fall, I've found it to be an excellent tool for managing documentation. It enhances the quality of the final documentation product whilest not getting in the way of writing it. I rather enjoy it.
I am now migrating some of my existing HOWTO documents over to the wiki. Afterward, there's an chance I'll actually integrate suggestions and corrections into the documents; something I haven't done in two years. Messing with the Docbook XML has been too much of a pain to go back and perform any document maintanence.
The first document to be moved over, for no particular reason, is the Dirvish HOWTO.