I'm obviously not very optimistic that this will lead to good. I've lived under the wanktitude of Specter long enough to know that he rarely actually does anything positive. As Harry Reid said to a small group of bloggers last year in Denver, (quote from memory) "Arlen Specter's with us except when we need him." Question now is whether Specter will be with them when they do need him.
On the plus side, Senate staffers inform me that Republicans in the Senate are visibly in agony right now. So at least we have that!