Mother Jones is maintaining an interactive map of "Occupy" protests around the US, and beyond. That little lonely red dot in the Pacific is a demonstration in Hilo, Hawaii! If you know of others, tell them: "Send a link to a news article or blog posts to traja [at] motherjones [dot] com or @tasneemraja."
You can find more information about demonstration gatherings at the Occupy Wall Street and Occupy Together websites, the "official" sites for this movement. The latter shows more than 300 Occupy meetups in cities around the world.
(thanks, Michael Mechanic)