Justification? Because navigation is a model activity. Because scannable, megabox navigation works well. Because usability tests revealed no significant usability problems. Because content is king.
Eventually, there is an interface planned for all manner of user options, to be accessed via login. Right now, a user can set a preference that's stored in a cookie.
Robert J Crisler
Manager, Internet and Interactive Media
321 Canfield Administration Building
University of Nebraska-Lincoln