That's an intersting question. They've got Libby and have already let Rove off the hook, and there's problably no way in hell they're gonna go after Bush or Cheney. So if Libby gets off, then no one gets punished for this.
But I do think Libby well be found guilty and I use to think he would get a pardon, but the more I thought about it, the less likely it seems. Just look at Bush's history with Enron and Abramoff, when shit hits the fan Bush puts as much distance as he can. So I don't think Bush would give a crap if Libby went to prison. After all, he's Bush.