Sunnyside Taco Truck
The good one is on the corner of 41st and Queens Blvd. I think the hours are something like 7:30 p.m. to 4:00 a.m. Good chicken tacos. Be sure to ask for "pickles" (picked jalapenos and carrots - hot! excellent!). There's another truck that parks on 46th, between Queens Blvd. and Greenpoint Ave., but other posters have said it's not worth trying.