Breaking down the conference races

Here are the different scenarios for who could win or play for each conference championship.

ACC
For the Coastal Division, Virginia Tech is in the championship.
For the Atlantic Division, NC State is in if they beat Maryland, otherwise, it's Florida St.

Big 12
For the North Division, Nebraska is in the championship if they beat Colorado, or if Missouri loses to Kansas. If Nebraska loses and Missouri wins, then Missouri will represent the North.
For the South Division, Oklahoma St. is in if they beat Oklahoma. If Oklahoma wins, then it's a three way tie between OU, OSU, and Texas A&M, assuming A&M beats Texas. Since OU would have beaten OSU, and OSU beat A&M, and A&M beat OU, the tie-breaker goes to the BCS standings, unless two teams are adjacent to each other in the BCS standings. The most likely result is that OU would be the highest ranked, unless A&M gathers a huge number of votes after beating Texas. If A&M is immediately after or higher than OU, then A&M would represent the South.

Big East
Most Big East teams still have two conference games remaining, and because the race is so tight there are lots of different scenarios. Pittsburgh is in the driver's seat, so if they win out, they win the championship. If Pitt loses, then UConn takes over the driver's seat since they have beaten Pitt and West Virginia. West Virginia would need to win out and have Connecticut lose one of their last two games.

Big 10
Three teams are tied for first, and since they did not all play each other, it goes to the BCS standings. Barring radical changes in the voting, and assuming they all win out, Wisconsin goes to the Rose Bowl. If Wisconsin loses then it's Ohio State. If Wisconsin and Ohio St. lose, then it's Michigan State.

Conference USA
For the Eastern division, Central Florida will play in the championship if they beat Memphis. If they lose and Southern Miss. and ECU win, it becomes a three way tie in the East. Central Florida beat ECU, ECU beat Southern Miss., and Southern Miss. beat Central Florida, so the tie breaker goes to the record within the division. Since ECU has the better record within the division (4-1), that means ECU goes to the championship if UCF loses and ECU wins. If UCF and ECU lose, then S. Miss. goes if they win. If all three lose, then it's still UCF.

The Western division is slightly less confusing. If S. Methodist beats ECU, then they will go to the championship game. If S. Methodist loses and Tulsa beats S. Mississippi, then Tulsa goes to the championship. If they both lose, it's S. Methodist.

MAC
In the East, if Ohio beats Kent St., then Ohio plays for the MAC championship. If Ohio loses, Miami will represent the East.

In the West, Northern Illinois has secured their spot in the championship game.

Mountain West
TCU has won the Mountain West Conference. Even if the lose to New Mexico, they're still the champions based on their earlier victory over Utah.

Pac-10
Oregon is in the driver's seat, and can even afford to lose one game. Stanford's only hope of claiming the championship is if Oregon loses their last two games and Stanford beats Oregon St.

SEC
The SEC championship has been set, and it will be South Carolina vs. Auburn. That doesn't mean this week's games are meaningless though, with South Carolina playing in-state rival Clemson and Auburn playing arch-rival Alabama.

Sun Belt
Florida International is in the lead for the Sun Belt championship, and can even afford to lose one of their two remaining games. If they lose two and Troy wins two however, then Troy will be the champion. If Troy loses either of their last two games, then Florida International will be the champion.

WAC
Boise St. will take the WAC championship if they win their remaining two games. However if they stumble, that opens the possibility for Hawaii or Nevada to win the championship. If Boise St. loses their last two games and Hawaii beats New Mexico St., then Hawaii is the champion. If Boise St. loses to Nevada and Hawaii loses to New Mexico St., then Nevada will be the champion if they go on to beat La. Tech.