We use Doku for official russian Ubuntu Wiki
http://help.ubuntu.ru. And we has a lot of problems with user profiles. One of them is that we can't see user's activity on wiki.
May be exist a plugin, which build for each user a page with all of their contribution to wiki? And has anyone some tips for organaizing a public wiki for open comminity? Now I need an ability to diskuss pages (I can implement it) and an ability to see each user's contribution, but may be there is other usefull tools?