That's one thing that has been on my mind for eons. I've got a few people I'm looking at as potential admin candidates (i.e. those people who continue contributing to the wiki)
Knowledge of public domain-ness is very important of course, but also is the willingness to actually spend the time on the wiki to check the scores, as well as a personality willing to accept mistakes (and yes there will be! Everyone makes dozens of them, with me leading the pack
) and learn more about the copyright laws. This is why I have not yet set a test course for admins, because while knowledge is testable, the other facets that make a good admin is not, unfortunately.
That said, I do have one person that I've wanted to ask for a while: Mcroskell. He has submitted tons of scores, so I'm sure his knowledge of the copyright laws is quite good, and he does have the dedication. Of course there are also several others I'm looking at, and may ask in the future
I'm thinking that in the end we may have something similar to what Wikipedia has (community voting). The problem is that I'm not sure there are enough contributors on IMSLP for a mass vote to be feasible... which is why I have so far only hand picked admins. I also would like to avoid the bad air that goes around during elections, though I guess that is inevitable if IMSLP grows to a certain point and voting becomes the only choice.
In any case, Mcroskell, when you see this thread, please reply whether you would like to be an admin
For everyone else, feel free to say whatever you have on mind, or bash me for not appointing more admins