There must be a food fan on the Monkey Do team who decided that rather than roam through site after site when hunger strikes, he/she would pull the various strands together.
I am just assuming here.
In any case, Edible City puts 19 New York City Food Trucks on the map so you can find them easily.
They are still Beta tasting so you need to request a password to use the service.
Of course they have a mobile option, I hope it's not Apple only, would not work on my HTC Inspire…