Phil Steele's blog is a must-read, even if you don't always agree with him. (Oregon fans still grousing about his lack of respect for the Ducks in the 2009 preseason should note that he's ranked them 10th this year.)
He has published his strength of schedule rankings and four Pac-10 teams rate among the top 15 and all 10 are among the top 55.
According to Steele, poor ole Iowa State has the nation's toughest schedule. While I suspect UCLA and Oregon State would be eager to trade schedules with the Cyclones, who play Northern Illinois and Northern Iowa, the list is worth a look.
As for the Pac-10, it goes like this: No. 3 UCLA, No. 6 Oregon State, No. 7 Washington, No. 13 Washington State, No. 29 Arizona State, No. 32 California, No. 34 Stanford, No. 40 Arizona, No. 45 USC and No. 55 Oregon.
Now Ducks fans, feel free to object to that schedule ranking. Not sure how playing road games with Tennessee, USC, California and Oregon State constitute a schedule with a middling degree of difficulty.