Are you live-blogging the State of the Union? Join the crowd. As politics gets more hyper-networked and public attention fragments, live events--especially the attention-grabbing kind--are becoming major digital organizing opportunities. The most common kind are in the realm of messaging and quick response; everyday you can see memes bubble up and spread online. At the moment, for example, one part of the political Twittersphere is chortling over the arrest of conservative media activist James O'Keefe (see the #jamesokeefemovies while another part is reacting to the news that Senator Joe Lieberman has just joined Twitter. There's no better moment for this kind of online organizing than a national political event like a President's State of the Union speech; the only thing that...