Hmmmm - well I don't think he needs the freedom of the website, as he has that already.
As for promotion, I think he is already about as far as he can go, unless he was made Assistant/Deputy Editor-in-Chief?
How about creating 'The Muckshifter Outstanding Contribution Award' which he can present on a monthly or yearly basis to a member he feels (or in consultation with the Gang-of-Five) has made a significant contribution to the site? - maybe some sort of graphic could be created and put under that members username?