When discussing expansion, has anyone heard it definitively said it would be 1 school only.  Could a Texas, A&M and Mizzou package ever be on the table.  That builds a 14 team super conference and would bring with it some established rivalry's, the TV markets in St. Louis (that which isn't Illinois loyal) along with Dallas/Ft. Worth, San Antoinio, Houston and Austin.  It would allow some geographic proximity (although IIRC Columbia is further from Austin than Urbana-Champaign).  Put together a couple of 7 team divisions and you have a major earthquake on the college sports landscape.  Imagine this line-up...
Division A:
Minnesota, Iowa, Northwestern, Michigan, MSU, PSU and Wisconsin
Division B:
tOSU, Indiana, Purdue, Illinois, Texas, A&M and Mizzou
The only downside to this is the academic issue (which I think is bigger than many really appreciate) with A&M.  Mizzou would be a bottom level academic institution in the Big 10, but is close enough in its rankings to be arguable.  A&M on the other hand is not at the level where most would like to see the conference go academically.  If they were to go this direction, I would think there would need to be iron clad guarantee's that A&M would upgrade itself academically.  We'll see.  I still say the conference is leveraging its Big XII dance partners to entice Notre Dame.