Wait, wasn't that whole "Flash mob" trend supposed to encourage completely spontaneous events that prompted hordes of people to gather at random places and then suddenly go away? Well, the Flash mob trend, which Harpers called "the most forgettable hipster fad of the past five years" persists as a marketing tool for Cingular and Sony Ericsson, and, if you're a Von Bondies fan, you'll get a free concert tonight at the Paradise. The whole......