I have an account on the wiki there, I just have not paid the 0.01btc to be able to edit the pages. I believe they implemented that to prevent spam. Once I get my MultiBit wallet back in working order I should be able to help you out with this, because then I can make the deposit to the wiki.
Save yourself the trouble/expense. I have edit privileges, but the problem is in the Maps extension of the wiki. It is not something you can resolve by editing the wiki article. To resolve the problem, you will need to edit php files on the webserver.
This is the underlying problem; I have tried to contact the administrator of the wiki. I tried IRC chat (personal messages), e-mail (on the contact page of the wiki) and a private message on this forum. I can see his account on this forum is still active, but he just doesn't reply to my messages. Since he is the only administrator of the wiki, the problem can not be resolved.
In this topic:
https://bitcointalksearch.org/topic/new-wiki-admins-wanted-160876 they are looking for extra admins for the wiki, but I don't know if the current admin is involved in that process.
I plan on adding some information to the article about other sites which offer ways to find bitcoin accepting businesses, so people will know where to look.