You can contact the organizers via the following email adresses:
- 31C3-orga (at) cccv.de
- for organisational issues
- 31C3-content (at) cccv.de
- for conference program-related stuff
- 31C3-tickets (at) cccv.de
- for questions concerning the ticket sale and tickets
- presse (at) ccc.de
- for press and pr issues
There is also an IRC-Channel #31C3 at hackint (irc://irc.hackint.org/#31C3) and freenode (irc://irc.freenode.net/#31C3). You won't get any official information there, but you can get in contact with a lot people participating the congress. Most of them will be able to answer main questions as well, as there are quite a lot people involved in setting up and running the congress. Be one of us!
Regarding the wiki you will find the persons managing it in the #31C3-wiki irc channel on irc.hackint.org.