There is a new preview up at IGN:http://xbox.ign.com/articles/521/521410p1.html
Homefield Advantage does a great job of recreating the benefits of having a massive crowd behind you. When on defense, the home team player can try and bring the crowd into the game. Tapping the "Homefield Advantage" button repeatedly increases the pumpitude of the crowd. In a giant house known for rabid fans, like Wisconsin's Camp Randall Stadium, this can cause your opponent's controller to rumble frantically and the screen to shake like an epileptic bobblehead.
This goes beyond a visual and actually has an effect on a player's confidence (which I'll get into in #3) and can make audibles impossible. In fact, I gave an audible a shot when I brought the Wolverines to Wisconsin. My receiver heard the wrong route and wasn't there to catch the ball. He wasn't even close. Fortunately, neither were any Badgers. The effects of this are much less intense at say, the home of the Chattanooga Mocs, who's fans only get up on Free Viagra Day. In that scenario, the pump meter is tougher to fill and the effect is not nearly as severe.
I can't believe he would diss my school that way! How funny is that though, I never expected my beloved Mocs to be mentioned in a review of a football game. (truly a TN Vol fan, Mocs as well though)
Anyway, I can't wait for this years game.
I'll be buying ESPN and NCAA, again, as always.