Unless PSU loses, I don't think OSU can make a BCS Bowl. Considering that a 2 loss ND team is guaranteed a BCS bid and they're a lock to run the table (Navy, 'Cuse, & Stamford remaining), there's only one at-large bid to get.
Pac-10
If UCLA beats USC (which is unlikely), OSU is guaranteed to get bumped from the BCS. UCLA would get the Pac-10's automatic bid & USC would almost be guaranteed to get the one at-large spot.
But this won't happen. USC will run the table & play in the Rose Bowl, and a 2 loss Ohio State team would be favored for the at-large over a 2-loss UCLA.
ACC
The biggest thing that happened for OSU yesterday is the ACC games:
The Va Tech loss REALLY helped us out. It basically puts them out of the picture for the at-large bid, because Ohio State is more attractive to the BCS than the Hokies, even with having 1 more loss than they do. The Florida State loss was big too. The only way they make the BCS is by beating Miami in the CCG, and if they don't, they'll finish the season with 3 losses & out of the BCS.
What will most likely happen: Miami will beat FSU in the CCG (Miami has gotten better since the 1st game while FSU has gotten worse, and FSU won't beat Miami twice in one season. Won't happen), and Va Tech will be on the outside looking in.