Rule Changes 2006
I guess the biggest change is the starting of the game clock from the moment the referee spots the ball instead of when the ball is snapped. I know the Pac-10 coaches hate this rule change. It's a disadvantage if you are the trailing team, but I guess from a fan standpoint, it's good if your team is ahead since it gives the trailing team less time to organize plays. They say this will shorten the game by 5 minutes. I don't like this rule change because this is totally done for television and not out of a necessity. 5 minutes. Big whoops. Here's an idea, why not cut those extended halftime shows or maybe do away with some of the required "station breaks". I'm sure you can find 5 minutes of less commercial breaks somewhere.
Also on kickoffs, the time will now start as soon as the kicker's foot touches the ball. Supposedly this will also make the game shorter.
One interesting change to watch is to see if shortening the kicking tee from 2 inches to 1 inch will cause more return kicks instead of touchbacks. In the case of the Ducks, this is a good thing since they have Jonathan Stewart returning kicks.
Finally, the instant replay rule has been tweaked. Coach's will only have one replay challenge per game and the team must have at least one timeout available when the challenge is called.