Addendum:
1 and only time a team will win the BCSNC without winning its conference. The poor TV ratings will ensure that it remains a 1.
The ratings were low because it was on ESPN instead of ABC (cable/satellite instead of over the air). A lot of people don't get ESPN. ESPN is very pleased with the ratings. I believe it was the second highest rating ever received by a cable network. The people claiming low ratings are the people who didn't want to see the rematch.
The only cable game with higher ratings was Auburn v. Oregon. And, Bama v. LSU was higher rated than several BCSNC games on networks, including Ohio State v. Miami in 2002, USC v. Oklahoma in 2004, Texas v. USC in 2005, and Alabama v. Texas in 2009. So these complaints are more political than based on reality. http://en.wikipedia.org/wiki/BCS_National_Championship_Game
You know some OkSt fans were watching, even T Boone admitted that Bama would have beaten them.