Just for your interest:
http://commons.wikimedia.org/wiki/Commons:Arbitration http://commons.wikimedia.org/wiki/Commons_talk:Arbitration
They just had their first really bad admin-vs-admin fights, and think something like the en:wp AC could do the job.
If you go to the end of the talk page, you'll see Pfctdayelise proposing a sort of mediated arbitration - where the parties pick an uninvolved admin who's willing to try to sort things out.
The Commons community has nothing like the drama en:wp does.
- d.