Sparty plays at Nebraska next week, if they win that game then they are pretty much certain of going to the Big Ten championship. If they lose, then it could turn into a four team race with Iowa, Michigan, Sparty and Nebraska all virtually tied. So I will cheer for Nebraska in that game next week, because a little chaos on that other side will be fun.
As far as Wisconsin goes on from this game, it really didn't hurt their chances at all to get into the CCG. Their way in remains the same as it did before yesterday, just win. But it has to deflate them a bit, going from national title contenders to now out of the picture. If they can regroup and beat us, then it likely comes down to a Penn State/Wisconsin showdown at the end of the season in Madison to see who wins the leaders.
If we beat Wisconsin...then practically the entire division is still in, even Purdue and Illinois (said with a bit of jest).