The Colley Matrix is one of the computer rankings used in the present BCS formula. Dr. Colley's website has a 'What If' feature that allows you to add or remove games to see how they would have changed the rankings (i.e. you could add 'What if Ohio State beat Nebraska' to simulate how a conference championship game would have helped the Buckeyes). It's a lot of fun, and you can learn a lot about how important strength of schedule is.
Note: the last poll was done before any bowls were played, so you can add some of those games for fun too.