But would an undefeated Nebraska team jump a 1 loss team (especially if it's Alabama or another SEC team) if we beat an Ohio State team that isn't in also in the running for the MNC?
we wouldn't need to jump them, we'd already be ahead of them. you'll have a hard time finding a season where a 1 loss team jumped an undefeated team from one of the SEC/Pac12/Big12/B1G. Just isn't going to happen. We aren't Boise, we aren't Utah. We'll be fine. Now if we've got a bunch of 1-2 loss teams...we aren't going to stand a chance regardless of how highly ranked Ohio State is. We're just starting to low, and our loss isn't going to be in week 4, it'll be in week 11 or 12. The only way I see us jumping a 1 loss SEC team is if that SEC team isn't playing for the SEC championship. Even then, I think we'll be one of the lower rated 1 loss teams. We'd have to have a lot of 2 loss teams.
just for numbers (BCS rankings top):
2012: no one loss above a zero
2011: ditto
2010: same
2009: Florida one spot ahead of Boise
2008: five teams ahead of Utah and then two ahead of Boise
2007: several two loss teams above Hawaii
2006: several one and two losses above Boise
2005: none
2004: Texas and Cal above Utah and a couple two losses above Boise
2003: none
2002: none
2001: none
2000: none
1999: 11 teams ahead of Marshall with a couple three loss teams
1998: nine above Tulane with a couple of two losses
So, yes, kchusker's logic checks out; it would seem that if Nebraska is undefeated, there is no concern about being jumped by a one losser as Nebraska is not Tulane, Marshall, Boise, Utah, or Hawaii--I think you are safe.