I just posted this as part of a forum post, so I may as well repeat it here.
I am tasked with evaluating WordPress.org server download, not as a blogging tool, but as a potential help/support site tool.
I can tell you with some authority that if a WordPress version were actually DESIGNED for this purpose, it would blow away every Help Authoring Tool (HAT) currently on the market. And these server HAT's, e.g. RoboHelp Server, Madcap Flare Server, start at $3000 and go up from there!! -- you heard it here first ;-).
The Help/Support/Tech Writer/Instructional Designer world will thank you for it, and pay you for it, both!