The only sure thing in the BCS title chase entering the second-to-last weekend of the season is chaos. Well, and that LSU will play for the title if it finishes 13-0.
But, what if....
...Alabama beats Auburn? Barring other upsets, Alabama is likely to play for the title too, but it's not a sure thing. Voters could get to December 4th and decide they don't want a rematch and/or do want to reward a conference champion. Is that likely? It wouldn't seem so, and the only team I could imagine voters going for otherwise would be current human poll No. 6 Oklahoma State. It's going to be tough for the Cowboys to catch Alabama with Virginia Tech and Stanford ahead of them in the polls though.
...Arkansas beats LSU? Well, assuming Alabama beats Auburn also, the SEC West falls into a three-way tiebreaker, which in this case, would be decided by BCS standings and head-to-head. The lowest-rated team of the three in this coming Sunday's rankings would be eliminated, and then head-to-head between the other two would decide it.
So, traditional voting patterns would indicate LSU would drop to third (he who loses last, loses worst). That would give Alabama the division crown. You could also make a case for ordering them Arkansas, LSU, Alabama (they beat each other, of course, but Bama's win came at home, while the others won on the road). That would give Arkansas the West title. I can't imagine Arkansas winning and still being third, but if that happened, LSU is still the West champion.
In any event, whichever team won would play for the BCS title as a 12-1 SEC champion. That team's opponent is more uncertain, but it could be one of its divison foes, or again, Oklahoma State.
...Georgia wins the SEC? I don't think it's a difficult concept to accept that the top two teams in the country could be in the same conference. But, if that is truly the case, don't you think one of them could manage to win the league?
If the Bulldogs pull it off, expect them to shoot way up the rankings. They might end up even being the top rated SEC team in the human polls (assuming they beat Georgia Tech this week). In 2001, two-loss, Big 12 champion Colorado finished ahead of one-loss Nebraska in the polls, but NU ended up in the BCS title game anyway because the polls were only 25% of the formula back then.
In any event, this is the best case scenario for an Oklahoma State or Virginia Tech (if the voters still love them) to get into the title game. I doubt very seriously that we would have two non-champion SEC teams playing for the BCS title. However, if that does happen, Georgia still would get to go the Sugar Bowl as the SEC titlist. That situation is the one exception to the two-team-per-conference limit.