Where is Tony Snow?

Not that it matters that much, but McClellan's last day was supposed to be Friday, and yet he's still giving the press briefings today. Is Tony Snow not ready? Do they not want to trust Hayden/Goss to an inexperienced hand?

Is McClellan going to have to have to stay on the job through the Rove indictment? (Which would be incredibly ironic since his worst moment at the podium was when it was revealed that Rove had lied to him about outing Plame.)

What gives?