I find the wiki quite valuable and I use it almost every day. (My middle aged brain can't remember as much as it used to!) Unfortunately with BRGroup conference planning (which is underway now), conference book publishing, forum moderating and completely rewriting my application for BR 4.2 right now, I feel like I have bitten off as much as I can handle.
Having said that, I am extremely guilty of inadequately expressing my appreciation for your work on this wiki. I am so glad to have this tool. It saves my bacon every day and I'm sure that I'm not the only one. Thank you sincerely for the countless hours that I KNOW you have put into it.
Perhaps it would help if you could be more specific in what kind of help you are looking for, such as:
Are you rewriting some section of the wiki? What section and why? (what is the objective?)
Help with incorporating release notes as they become available?
Proof-reading older material to remove duplicates?
Separating keywords or topics to their own pages?
I don't think that many people know what is involved behind the scenes on the wiki, so you may get more responses if you can "carve out" specific tasks so people can volunteer for a more precise job that needs "doing". Most people are hesitant to sign on for vague or open-ended things, but if they know the limits of the job, they may feel that they can take that part on.