Well, there's not many people active here, and Solidvanz was made one at some point.
I mean, I won't say no to being made an admin and I'm currently one at the MPQ wiki, so I have some degree of experience. I wouldn't usually suggest myself first for this kind of thing, but I'm the only other person aside from Solidvanz who's somewhat active here.
I haven't thought of any rules yet (other than "Members must make at least one edit to a MGWA wiki other than their main one per month.", which I feel is too strict), but I was thinking about designing a template that every member of the MGWA puts on their main page; said template would list the members of the MGWA in chronological order of when they joined, as well as showing the favicon of each wiki in the alliance.
EDIT: After having troubles with the favicon, I've instead decided to show each wiki as a certain color. My wiki will be 0081EA, while yours could be whatever shade of purple is in the theme, which if I'm not mistaken is 9370DB. Of course, there is also 4B0082, for the buttons. EDIT 2: I've decided to go with 9370DB, as it's easier to read on my wiki.
How long does it take you to do it? I need it to be inside that border pic I linked earlier. You'll need to cut out Iron Man from your pic to fit into the border. If you don't want to, I can do all that. Just gimmie all pics in a zip or something.
Not going to force you to do anything of course. I can get it all done, albeit slower! :D