ABC / ESPN College Football Coverage maps for Sep. 27th. Two of the four early regional games will be in HD.

3:30 PM
Colorado at Florida State (HD) (reverse mirror with ESPN)
Wisconsin at Michigan (HD) (reverse mirror with ESPN)
Arkansas at Texas
Fresno State at UCLA

Colorado at Florida State will be seen on ESPN (SD only) in the parts of the country receiving Wisconsin at Michigan on ABC. In all other parts of the country Wisconsin at Michigan will be seen on ESPN and ESPNHD.

8:00 PM
Illinois at Penn State (HD)
Virginia Tech at Nebraska (HD)

After doing some math, I now present the combined percentages for 3:30 based on info from both the ESPN and ABC maps:

100% of the nation will receive Wisconsin-Michigan, either on ABC or ESPN.

For the other games:
61% - Colorado-Florida State (ABC/ESPN)
21% - Arkansas-Texas (ABC)
18% - Fresno State-UCLA (ABC)