While Facebook and blogs were important to fundraising and messaging, Twitter is what allowed pro-Brown activists to stay in contact with each other, to feed each other news links, and generally to keep up each other's spirits at a time when the radar was showing that Brown had no chance.
I don't think it is an exaggeration to say that this was the first American Twitter revolution.
Rep. John Culberson (R-TX) told us this was coming:
We could move heaven and earth when the American people understand the power of social media, and everybody is simultaneously, of their own free will, asking their elected representatives to take action. There's not an elected official in the nation who could withstand that. And we the people, we'll take back our government — once people understand how easy this is.
The results of the Twitter revolution have been amazing, but the GOP should not take credit:
January 19 was an amazing day for grass-roots conservatism. But the Beltway GOP should be warned against unjustified triumphalism. They were late to the game. Activists still haven’t, and won’t, forget the massive amounts of money Washington, D.C. Republicans wasted on Dede Scozzafava. And Scott Brown quite noticeably didn’t mention the word “Republican” once during his prepared remarks...
The Brown victory was very clearly a strike against machine politics of all kinds and business as usual in Washington. That includes top-down meddling by tired old GOP operatives. The party bosses have tried to install their preferred Senate candidates in Florida, Colorado, and California. They will use Brown’s win to argue for more “mooooooderation.” As I wrote yesterday in my analysis of how Brown unified a center-right-indie coalition, that is not the lesson of the Massachusetts miracle.