Re: 2012/13 Observation Deck
The ACC (finally) has a grant of media rights agreement. That means if any team leaves the conference they forfeit all their TV money to the ACC until the ACC's current TV deal ends, which is in 2026/7.
The SEC's the only major conference w/o a media rights agreement, and they also have no exit fee. But who the hell's leaving the SEC?
So that probably ends the expansion, with the major conferences anyway.