Wikis are great to have updated info provided comunity is active enough.
I'll contribute for sure, but not sure about compromising in administration matters.
IMO we should move (or copy) the howtos from our forum to the wiki.
For ideas about contributions, we could look archlinux and/or gentoo wiki.
- Howto's -Mandatory
- Beginners guide - we already have great docs, so a link to installation guide and docs should do.
- Tips n' tricks - Thinks that are not real problems but you want to share your l33t way to do it quicker
- Sandbox - to test wiki syntax
Howto section should have subsections (desktop/server oriented....). Arch wiki has the order inverted, so people first look for desktop/server, and inside the "subsection", you can find howtos, scripts to do cool things, tips....
Just my 2 cents