I am not sure of the exact requirements or process for a player to successfully win an invitation to this volunteer position (and I don't think most people know, either), but at the same time, I get the feeling I would like some way for the many trusted members of the community as a whole to vouch for anyone with the potential to qualify. I mean, if there are dozens or even a couple hundred different players that all say, "Yeah, that one guy? That should totally be working for the community..." I think that would be a compelling argument for the nominated player's favor.
I don't know too many specifics right now. I simply want to officially propose a more clear way for selection into the Halls of Moderators.