The reason that the ACC is surviving is due to a slight, but important difference in how the BE collapsed. I think the fact that many of the schools know they have options is keeping them from moving. FSU and maybe Clemson know they can go to the B12 if they have to. UNC, VT, UVa, etc. have the B1G, B12, SEC as potential options. They all feel that they can wait for someone else to make a move first. The Big East teams were under a belief (rightfully so) that if they said no to the ACC, someone else would take their spot and they'd be stuck in UConn's situation(although I'm not sure they didn't think RU, WVU and Louisville would still be around also).
I think there has been plenty of sniffing around between the conferences and the attractive ACC programs, but I don't think they're all waiting to jump when the ink dries on the MD suit. I also agree with Nelson that the only way UConn gets in to the ACC is if it looks exactly like the old Big East. Our only chance otherwise would be if FSU and maybe Clemson leave and the traditional ACC gets their power back. If it is UNC, UVa, Duke, that leave, Cincy, USF and even a Texas school would get the call before us (in my opinion). The football powers don't want us Yankees to dilute their football, and our ex-brethren don't want us as competition.