Yea, that's the issue for the ACC. Though the expansion is generally driven by football and TV markets, they are a league loaded with basketball schools, so the presidents are going to be heavily interested in the basketball side. Adding Pitt, Syracuse, and UConn would make the ACC a ridiculous basketball league.
I know they all aren't great now, but those with UNC, Duke, UVA, Wake, NC State, Clemson, Georgia Tech, and Maryland is quite the basketball league.
I would guess that the ACC is done with expansion as well. My guess is 14 will be the new 12 for a while, and no one is going to jump to 16 until they see how 14 works for a little while.
The Big 10 and Pac 12 both are sitting at 12 still. The Big 12 is apparently set on trying to get back to 12 or at least 10. I still think the Big 12 implodes though in the future.
The SEC and ACC will lead the way with 14, and we'll see from there. I think it'll die down for a while. This whole CUSA/MWC/now Big East merger thing will collapse in just a couple years and the best football schools from each will form a new CUSA, that will essentially be the old CUSA plus a few teams. You'll probably see USF, UCF, Louisville, Cincinnati, Boise, Nevada, Air Force, SMU, Houston, and East Carolina, or some combination of teams like that withdraw and create their own new conference trying to garner a BCS bid.