Now in its fifth year, the Blog Poll is a weekly effort of dozens of college football-centric Web sites representing a wide array of schools under the oversight of founder/manager/guru Brian Cook at MGoBlog, and now appears on CBS Sportsline. It’s an effort to provide a more rigorous check on the mainstream polls that actually, like, count toward the mythical championship, and enthusiastically shines a light on its voters' biases. But mainly, it’s fun. The entire poll will be released later today.

This week's ballot is brought to you by the state song of Iowa, "The Song of Iowa," which reminds readers to:

See yonders fields of tasseled corn, Iowa in Iowa,
Where plenty fills her golden horn, Iowa in Iowa,
See how her wonderous praries shine.
To yonder sunset’s purpling line,
O! happy land, O! land of mine, Iowa, O! Iowa.

As always, the lineup is constructed exclusively on resumé to date, with no regard to predictions, abstract notions of inherent strength or any previous rankings this season; it's only reflective of games played so far. The full resumé chart for this week's poll is below the jump.

Iowa! Yes, I was persuaded by the Hawkeye-loving computers that the object of their affection has navigated a tougher schedule than the other six unbeaten teams, including Florida and Alabama, but that was true last week, too, when I kept Iowa No. 3 because of their much narrower margins of victory. What turned the tide for Iowa in my mind this week, after a couple close calls by the Gators and Tide against mediocre opponents, was a reconsideration of how well the Hawkeyes stack up in their biggest games:

Iowa has beaten six BCS-conference teams with .500 or better records, twice as many as any other undefeated team except Alabama (with four; see resumé chart below), and handled the best of those with roughly the same aplomb as the SEC killers, whose big overall margins of victory came via blowouts against cupcakes. The best arguments against the Hawkeyes right now are their close calls against their only pushovers, Northern Iowa and Arkansas State, but I'm willing to call it a a, 1b and 1c situation and give Iowa the benefit of the doubt for putting more, better skins on the wall. But that's just this week -- the call is close and certainly won't survive Florida beating Georgia or Alabama beating LSU over the next two weeks, when the Hawkeyes' schedule lightens considerably against Northwestern and Indiana.

+/–: Average margin of victory; SoS: Strength of schedule (calculated by Jeff Sagarin); Oppt %: Combined winning percentage all opponents.

As always, everything will be completely different next week.