Who is the "multitude?"

Those who read Hardt & Negri's Empire (Harvard UP) will recall their invocation of the "multitude"--led by St. Francis, as it were--as the transnational network of resistance. Well, I just got ahold of what amounts to the sequel to Empire: Multitude: War and Democracy in the Age of Empire (Penguin). I'm taking it along with me to Cambridge, but it looks fascinating. And ripe for theological engagement. I wonder if what Hardt & Negri are looking for from "the multitude" might be precisely what one would hope to find in the ekklesia? I would highly recommend reading this book alongside Daniel Bell's outstanding work, Liberation Theology After the End of History, in the Radical Orthodoxy series (Routledge).