Seems like 12-12 is the day for OWS "Shutdowns". While going out for my run at lunch here in downtown San Diego, I noticed a poster/sticker affixed to one of the street light posts, asking "the 99%" to join together with OWS San Diego to "shut down" the waterfront.
A google search found this-- Shut Down the Waterfront
It seems to be a nation wide effort.
Of course, when done some weeks ago in Oakland, it ended with violence, fires, a decent amount of property damage and a great loss of money for the area.