I was waiting for official word before posting and now it seems the bad news is true: Cinderella has canceled their summer tour. Singer Tom Keifer has a hemorrhaged vocal cord and therefore cannot perform. Warrant, Lynch Mob and Lynam are a part of this package.
Of course this means Cinderella is out of Rocklahoma. This is especially problematic as Cinderella signed on as the Saturday headliner.Warrant is still playing Rocklahoma and I presume the same about Lynch Mob, but I don't know about Lynam. I've got an email into Lynam's lead singer to see about getting some answers. At this point, Warrant is apparently trying to rebook shows on their own. We'll see what happens I guess.
I just heard back from Jacob Bunton and Lynam will still be at Rocklahoma, so at least that's a little good news. He also says he doesn't have any more information on the tour, but promises an update after some decisions are made.