While we're still waiting on confirmation, a tipster tells SFist, "Appx. 100 No on 8 protesters are now (6pm) staging a sit-in in the intersection of 18th & Castro. Police have blocked off the surrounding streets. Protester with a bullhorn who seems to be in charge says that they will be there all night." In the Castro? Huh. Why? Strange. Anyway, it's happening in the Castro. Head on over if the mood should strike.