I do like PCM's "Nokota" idea, but that would take some educating of the public, which may be difficult marketing-wise as well. That being said "Nokota" does fit very well and someone had mentioned if/when football moves back outside that would be a nice mascot to lead the team out on the field.
BTW, DAK, love the avatar. I love geography, maps, aerial photos. Right up my alley.