Time to put the Big Ten's Rose Bowl tiebreaking procedure in here.
If Sparty wins out, they're in the Rose Bowl unless they end up BCS #1 or #2. If they go to the BCS title game, then the Rose Bowl would be forced to take the highest ranked among Boise-TCU-Utah, as long as that ranking is somewhere between BCS #3 and BCS #12.
If Sparty loses 1 game and tOSU wins out, the two-team tiebreaker is the higher-ranked team in the BCS (since there's no head-to-head and both teams would have the same overall record).
For a 3-way 1-loss tie with Iowa, Sparty, and tOSU - Iowa would be eliminated based on overall record, and then Sparty-tOSU would be decided based on higher BCS ranking.
For a 3-way 1-loss tie with Sparty, Wiscy, and tOSU, it would be decided by the highest ranked BCS team. They do NOT use best winning % among games played head-to-head among the 3 teams.
A 3-way 1-loss tie with Iowa, Wiscy, and tOSU is not possible due to games remaining.
In summary, if tOSU wins out, 1 Sparty loss should put tOSU in the Rose Bowl, since they'd presumably be above Sparty in the BCS but not back to BCS #1 or #2. But if Sparty makes the BCS Title Game, tOSU would not get the Rose Bowl unless Sparty's opponent in the Title Game is a non-AQ team.
I'm not bothering to determine 2-loss champion scenarios at this point.
Big.Ten.AQ.Rules
Remaining schedules:
Sparty (7-0, 3-0): @NW, @Iowa, Minn, Purd, @PSU
Iowa (5-1, 2-0): Wisc, Sparty, @Ind, @NW, tOSU, Minn
Wisc (6-1, 2-1): @Iowa, @Purd, Ind, @TSUN, NW
tOSU (6-1, 2-1): Purd, @Minn, PSU, @Iowa, TSUN