Fortunately, Texas looks to be in a strong enough position this season that the BCS formula shouldn't impact them like last season. Win and let everything take care of itself.
But, last season the difference between NC teams was minuscule and the Longhorns ended up on the short end of the BCS formula. At the time I made the assertion that because both OU and UF scheduled lower division teams that don't count in the formula (Tenn-Chatt & Citadel respectively) they had an advantage over Texas. I believe this to be true in that UT's win over UTEP (the worst non-con opponent) ends up being a net negative for their strength of schedule, while OU and UF wins over non-division opponents were a net neutral.
This week we get to see two very closely ranked teams in the same conference play it out during the same weekend and I'll be curious to see how it works out. Alabama plays FCS Tenn-Chatt while Florida plays FBS FIU. Florida's rout of FIU should hurt their S-o-S, while Alabama's destruction of Tenn-Chatt should have no impact on their S-o-S. Yes, sure, there are other factors that may make it hard to tell, like how the teams they've already played did today. And, both Bama and the Gators will now share FIU as a common opponent, as well as Florida already laid waste to their FCS opponent to start their season.
But, I will be curious nonetheless about how much playing a terrible FBS team hurts the overall BCS formula rating, while playing any FCS team doesn't do anything. And I'll always wonder if last season could have turned out better for us if we had played a FCS team instead of UTEP. As long as the BCS formula has this quirk it may make sense to schedule one FCS team a season instead of the obligatory doormat FBS team.