As for Specter, I don't believe that he'll be as big a problem as people might think. I know he's pro-choice, but he's not going to buck the president. The real question to me is what kind of SC nominees that president will send up. I'll bet anything he gets the chance over the next four years.
I hope you're correct that Specter won't buck President Bush. Looking at Bush's appellate and district court nominees, I'm encouraged. Although there's been speculation about Alberto Gonzales, I doubt he'd nominate him (and I hear he's interested in the A.G. job should Ashcroft step aside), or anyone like him. I presume he'd nominate a "quiet conservative" - someone who isn't an activist or who has a large list of published material, so the opposition would have a hard time. That'll be tough. Hope for the best (and Chief Justice Thomas).