Contrary to the disaster that the BE comm. said ACC expansion would be, IMO it could be the best thing to happen to college fb (except maybe for Pitt, WVU and VT). With 12, the dominos could lead to the end of the CUSA, WAC and SunBelt monstrosities and lead to 5 BCS conferences that overlap only in Iowa (B10+1/B12) and Georgia, S. Carolina and Florida (ACC/SEC) and 4 non-BCS conferences that are geographically compact and overlap very little (W.WAC+MWC--reformed WAC, E. WAC + western CUSA--New SWC, MAC, and leftover BE+eastern CUSA--new BE).
With the new BE likely to retain BCS status until it gets lost, there will be little gap between the bottom of the BCS and the top of the rest. That will increase the pressure for a playoff which will benefit all the schools financially and narrow the gap between the BCS and the rest.
Here is how I see the dominos falling if the ACC-12 happens:
MWC-8 + Fresno, Hawaii, Nevada and Boise St.
New SWC (maybe Gulf Athletic Conference)
UTEP, Tulsa, Rice, SMU, La Tech, TCU, UH, Tulane, So. Miss., Memphis, UAB., S. Florida, Army, Navy
Pitt, VT, UConn, Rutgers, WVU, Temple, Cincinnati, Louisville, ECU, UCF.
Same less UCF + MTSU or maybe Southwest Missouri or UMass moving up.
There will be lower travel expenses and better rivalries for many of these schools-and the possibility of a group TV contract which would increase their bargaining power.
SJSU and most of the Sun Belt drop to I-AA or drop fb. Remaining Sun Belt members wait for the next shoe to drop in the 2003 realignment, which, like the 90s realignments, will have continued aftershocks for a decade or so (PSU to B10, Ark + USC to SEC, FSU-ACC, BE formed-triggered the SWC breakup, CUSA + Wac 16 which split to MWC and WAC 8--and to a bunch of changes in the Div. I conferences that don't play fb).
On the contrary, a 14 or 16 team ACC may not lead to a lot of change-and the WAC and CUSA need a lot of change to get more logical alignments.