The Oklahoma St. Cowboys at least waited for everybody to digest the news that the Oklahoma Sooners are exploring their options elsewhere to announce that they're doing the same. You can go ahead and figure they'll attempt to accompany Oklahoma to the Pac-12 (or SEC!) if that ends up being the move,
Keeping Okie State for the sake of keeping Okie State isn't mission critical to the Big 12, but losing both Oklahoma schools would essentially make the conference nothing but Texas and, um, Robert Griffin III, and he really doesn't have all that much eligibility left. Kansas, just keep playing basketball and somebody will come by to collect you.
You'll note it's only the Big 12 schools who could actually tempt another power conference that are putting out statements like this. These comments, along with BYU's, could be very good markers for the next round of realignment.
For more Cowboys, head to Oklahoma State blog Cowboys Ride For Free.