I came to a November 6 Cindy Sheehan protest which started shortly after "V" left, but you can see Cindy in the video, in gray coat and navy and white scarf at 1 minute 50 seconds and later at 14 minute 36 seconds -- complaining that the White House doesn't take her petitions, like they took "V's."
Obviously it was a fun protest and the link has made its way on to left, right, libertarian and other lists. The stylization of the movie was impressive and memorable. However the idea of the lone hero blowing up a bunch of government buildings while thousands wear his costume and march on police is a little too macho and authoritarian for me. I still prefer good old fashioned this is me and my face nonviolent action. Photos from the GiveMeLiberty page.