Haven't been able to find sum totals by schools, but the USA Today does break it down individually here (head coaches there as well):
Salary analysis of 2010 Football Bowl Subdivision coaches - USATODAY.com
You can also sort it and manually add things up which I did below (all teams have 9 asst's; bonuses were not included in my numbers and those vary widely from 0 to six figures sometimes).
Iowa State Big 12 Wally Burnham 300,000
Iowa State Big 12 Tom Herman 300,000
Iowa State Big 12 Bill Bleil 150,000
Iowa State Big 12 Bobby Elliott* 150,000
Iowa State Big 12 Curtis Bray 120,000
Iowa State Big 12 Courtney Mess. 120,000
Iowa State Big 12 Kenith Pope 120,000
Iowa State Big 12 Shane Burnham 100,000
Iowa State Big 12 Luke Wells 100,000
ISU Total: $1.46 million (Iowa's total is $1.65 million)
Baylor is unknown (had one guy at $336,000/yr)
Kansas: $1.95 million
K-State: $1.56 million
Mizzou: $2.07 million
OU: $2.65 million
Okie State: $2.54 million
Texas: $3.02 million
A&M: $1.67 million
Tech: $1.96 million
So as of 2010, we were in the basement, but I'd imagine that will change with Rhoads's new contract...