For the record, here is a list of AAU members:
Association of American Universities
Here are some members that actually have football teams that aren't in California (geography has to count a little for Big Ten expansion?):
Iowa State University (1958)
Rice University (1985)
Rutgers, The State University of New Jersey (1989)
Syracuse University (1966)
Texas A&M University (2001)
Tulane University (1958)
The University of Arizona (1985)
University at Buffalo, The State University of New York (1989)
University of Colorado at Boulder (1966)
University of Florida (1985)
The University of Kansas (1909)
University of Maryland, College Park (1969)
University of Missouri-Columbia (1908)
University of Nebraska-Lincoln (1909)
University of Pittsburgh (1974)
The University of Texas at Austin (1929)
University of Virginia (1904)
Vanderbilt University (1950)
Notre Dame ain't on the list.