Another thing i would like to add; having a blanket of anonymity isn't necessarily a bad thing. It not only "protects" the mediator, who has a difficult and unenviable job, it would cut down unnecessary and constant speculation...
Whether it's a person or a panel, he/she/they take(s) on such responsibility with the aim to help; to make this place better, so we should be patient and supportive. imo, of course. Kelly(she ROCKS!) is one such great example, and other...
Having a Mediator is a great idea and about time too. The forum is a huge, complex and highly complicated place peopled by all sorts. Whether it's panel or a person, there will, inevitably, be bias. To be totally bias free is impossible...