There was a flash mob in South Orange?

From the NYT article today on flash mobs in Philadelphia:

Flash mobs are not unique to Philadelphia, but they have been more frequent here than elsewhere. Others that resulted in arrests and injuries have been reported over the past year in Boston, South Orange, N.J., and Brooklyn.

South Orange? Sure enough, the local paper had this report just this week:

Last year, the town had problems with crowds in the downtown, but nothing like what happened this past weekend. The youths apparently used sites like Facebook and Twitter to communicate their plans for coming to South Orange, a place referred to on the Internet as the “Dah Ville.”

Update: South Orange Patch posted an article yesterday with a bunch of follow-up.