Brad Henry needs to run for this seat.
A little late for that at this point, as the filing deadline has passed. He wouldn't win, anyway; Oklahoma's not sending a Democrat to the Senate again for a long time.
As I noted with Al in 2004, Coburn is basically the perfect Republican candidate for OK geography-wise (and probably ideology-wise). I know he'll perform better than Inhofe for this reason - the question is how much.
Plus Andrew Rice was a serious candidate. These nobodies won't be able to raise the $2.8 million he managed to pull in.