We are making improvements to the Wiki to increase stability and improve security against spammers. These changes will also enable us to reopen the Wiki and allow contributions from the community.
The update will happen later today and will be testing over the weekend so for users who have access to the wiki, you will not be able to add any new articles or make any changes to the existing Wiki articles from Friday April 12 to Sunday April 14, 2013. The Wiki will be set to a read-only mode. The Wiki will be changed back to read/write mode no later than Monday April 15, 2013 so new articles and changes can be made then.
Sorry for the inconvenience. If you have any questions please let me know.