Watching people get excited about Senator Arlen Specter (Ambiguous-Pennsylvania) switching from a Republican to a Democrat is like watching a bunch of five-year-old analyze a chess match by counting the number of pieces each player has.
As a practical matter, the Democrats go from enjoying a 62-seat majority to enjoying a 62-seat majority. Just because Arlen Specter, Olympia Snowe (R-Maine), and Susan Collins (R-Maine) have Rs after their names doesn't mean squat. It's how they vote that counts. And those votes were lost to the Democrats a long time ago.
As I've said before (well, not here), the Republican's best strategy would have been to kick Specter, Snowe, and Collins out of the party after the "2009 Stimulus" bill was passed with their votes. Not as an angry, infantile response, but as a dramatic gesture indicating a strong strategic shift in policy and as protection against the inevitable backlash that will occur once the repercussions from the massive increase in debt start to roll in. Apparently they're still convinced that the hill to stand and fight on is gay marriage (a wrong stand on so many levels). Americans really need a new party - one with libertarian ideas, but not so many Libertarians.