Notre Dame scares me the most, but I think Kelly is safe/staying put for now.
Michigan is next on the list -- but I bet, even if they ditch Harbaugh, that they would try to aim higher given Campbell having only a good but not a great year this year.
Penn State concerns me slightly. It sounds like Franklin is going to be on the radar for a few big time schools, though I do not know how Penn State could not match their $$$.
Ohio State does not concern me now. Ryan Day seems firmly entrenched and, frankly, doing a really good job right now, assuming he can recruit at Urban's level. He is a pretty similar story to Lincoln Riley of a young coach replacing a legend and, all things considered, seeming to keep that program on just about the same level. So no worries about 614 right now.
I agree with the others that I doubt Campbell wants an SEC, ACC, or Pac-12 job. If he is going, it is for the NFL, ND, a Big Ten school, or *gasp* another Big 12 school.