The legacy media won't bother keeping count, but as of Friday, 4,752 people had been arrested nationwide in connection with the Occupy demonstrations. A spreadsheet breaking down these arrests by location an date can be found here. Arrest number 5000 should be a milestone reported in major media.

Don't hold your breath.

Update:

Matthew Continetti of the Weekly Standard has an excellent context-setting review of American utopians of the anarchist and Marxian persuasion, the precursors to the Occupy movement. It is important to understand the historical roots and precedents at work here.

Hat tip: Carmel Miller