I'm in the process of creating Fruckies.com for Food Truck Foodies. I haven't really seen any real activity in this niche market yet. If you love Food Trucks or know of a good local community, please let me know. :)
I'm the developer of TruxMap, a real-time food truck map for 21 US cities. Check out the iPhone or Android apps + the web app at <a href="http://www.foodtrucksmap.com/la/" rel="nofollow">http://www.foodtrucksmap.com/la/</a> . Let me know if you have any questions, info [a.t] truxmap.com