I think you all might be missing the point. The purpose for the computers is to make the ranking - or at least a portion of them - objective and based on data. When the computers come up with a different ranking than the human polls (which are laughably based on little emperical information) everyone gets bent out of shape; as if that somehow PROVES the computers are wrong. Frankly, it should be helpful to cause people to look a little closer to see why there might be a discrepency.
Also, remember this very important point: the computers ONLY take into account what has actually occurred. It doesn't matter what USC did last year, how tough someone's upcoming schedule is, what coach loses big games, and on and on. Therefore, I would posit that the computers probably do AT LEAST as good a job as the human polls.
The bigger problem is that college football is organized poorly. There is no mechanism to settle any of this. The BCS is dumb, the proposed BCS + 1 is dumb, and so are all of the other playoff-dodging formats. This is the kind of garbage we talk about when the whole thing is subjective.