Some of these schools would probably not interest the higher level prospects because of their depth chart but as of the Ferguson commit to Tennessee, here are the BCS schools(as of the 2013 season) without a 2013 QB commit:
South Florida Nebraska Utah
Duke North Carolina State Wake Forest
Florida Oregon Wisconsin
Florida State Oregon State Houston
Georgia Tech Pitt Memphis
Indiana Rutgers San Diego State
Kansas State TCU Minnesota
Clemson Temple
BCS schools without 2013 QB commit