Last month The Taco Truck, a New Jersey-based mobile food vendor and brick and mortar, said it planned to develop "multiple locations" here in Boston. But then again, lots of businesses threaten to come to Boston, so how can you know when one is serious? When they get a new truck. Yesterday The Taco Truck posted several photos on Facebook with the following caption: "Meet the newest and baddest member of the TTT family...TTTB (The Taco Truck Boston). Bringing the taco love to Beantown!" The company has yet to share a start date, but it appears to be a safe bet that they're on their way.