Why isn't there something like editor leader-board for /review?
Perhaps something that shows number of reviews, and a percentage actioned, or something similar. A simple way to rank users would just be reviews * percent actioned (though I am very open to suggestions).
As far as layout is concerned, I was thinking just ripping off the existing template for reputation, and showing both numbers (both reviewed and percent actioned, though not the breakdown).
I believe that this will help motivate some users to start using
/review more frequently.