“…these roving food outlets found a promotional niche on the Web thanks to the rise of Twitter, which lets them broadcast their changing location, advertise deals, and keep up a customer base. It fits: were there a culinary embodiment of short-and-sweet Twitter, it would be the food truck, mobile and ultra-niche and in the midst of broad yuppie popularity that some say will be a lasting cult following and some are still pegging as a fad. Plus, at least in certain U.S. cities, they’re pretty much unavoidable…”