Joi Ito's Hecklebot is going global tonight. That is, assuming Twitter doesn't crash. And if Twitter holds up under the traffic of most of its estimated three million users all chattering at once, we're all going to be participating in the birth of something new. You can call it the Global Brain or the Hive Mind, but the Machine that is Us/Using Us (to use Michael Wesch's brilliant phrase) is going up a level tonight, and media and democracy in America will never be the same.