When I first got onto Dokuwiki it was for the purpose of setting up a research intranet. It evolved into this:
http://www.cmcc.ufro.cl
I am no longer affiliated to that project, nor that collegue, but they still write to me and tell me about how great DW came to fill in those days.
Now I use DW in my personal wiki (detailsin my profile), as well as two game-related wikis around there, for which I can't provide links. Also I use DW to keep a live jounal, or diary, in a virtual machine in my pendrive. And of course the network courses in my collegue are now set up in a dokuwiki, after all I'm the tutor.
DW is just that great.