How many college football conferences are there?

In FBS there are 11, with the exception of Army, Navy, and Notre Dame (Independents). These are Atlantic Coast Confrence (ACC), Big 10, Big 12, Big East, Confrence USA, Mid-America Confrence (MAC), Mountain West (MWC), Pacific 10 (Pac-10), South Eastern Confrence (SEC), Sun Belt, and Western Athletic Confrence (WAC).
However, only team fron the Big 10, Big 12, Big East, Pac-10, ACC, and Independents can compete for the National Title. Recently there had been debate over this Since Boise State (WAC), Hawaii (WAC), Texas Christian (MWC), Utah (MWC), and Tulsa (C-USA) have done very well during the season, even to go undefeated (Boise State in 2008 and Utah in 2005)