16 Host sites.

Teams likely to host as of today:

Big Ten- UCLA, USC (Nebraska/Oregon with work to do)
ACC- Ga Tech/Fla St/NC (Virginia is pretty close to being likely as well- their schedule down the stretch is fairly easy)
Big 12- (WV or Kansas only ones with a chance)
Others- Oregon St/Coastal/Nasty Bunch (Missouri St has a 15 RPI a couple of good wins- does the committee reward them like they did a couple of teams a couple years ago????)
SEC- Texas/Fla (Texas is 2nd in RPI- Fla 5th)

So while things could certainly change- at least 10 host spots are already about locked in. That leaves 6 more up for grabs with Va likely to get one of those.