It's a pretty extensive list so far, but here's the list of schools that have lost their coaches so far, either through firing or leaving for a new school. 40 schools so far.
American,
Arkansas State,
Army,
Austin Peay,
Bowling Green,
Bucknell,
Buffalo,
Cal,
East Tennessee State,
Fairleigh Dickinson,
Georgetown,
Georgia Southern,
Georgia Tech,
High Point,
Holy Cross,
Idaho,
Iona,
Manhattan,
McNeese State,
New Hampshire,
New Jersey IT,
New Mexico State,
North Carolina A&T,
Northwestern State,
Notre Dame,
Ole Miss,
Providence,
Southern Utah,
St. Johns,
Syracuse,
Temple,
Texas,
Texas A&M-Corpus Christi,
Texas Tech,
USF,
UT-Arlington,
UW-Green Bay,
Western Kentucky,
Wichita State,
Wofford