LV - I posted it in the BCS thread...
Since it'll be a 3 way tie (USC, UCLA and Oregon (assuming a UCLA win)) the first tie break in a 3 way system is performance against common opponants. USC and Oregon beat Arizona, UCLA did not, thus UCLA is "out" then, as between Oregon and USC, USC wins head to head.
Seems like the Big Ten isn't the only conference with some "screwy" rules.