The BCS rankings are used to determine college football's national champion. It also provides the formula for filling in the remainder of the BCS games.
Teams like the Alabama Crimson Tide are never happy to be left out of the big game, but the Boise State Broncos and Houston Cougars benefit greatly from getting any BCS spot.
The rules guarantee that certain teams not in BCS conferences will get an automatic berth so long as they can win out. They will be included in this slideshow since their inclusion in the BCS would reduce the number of at-large spots.