Apparently Mizzou is out and West Virginia is into the Big 12. Not a done deal though.
Oh it's done, it just might be delayed a year or so. The Big East has a clause requiring teams to give 27 months notice to leaving so WV won't be in until around 2014. The current Big 12 television contract has a clause voiding it if the conference can not maintain at least 10 members. This means the Big 12 will usual every lawyer necessary to keep Mizzou around until WV can break free of the Big East.