Following mobile vendors on twitter

Restaurants put food in trucks, drive the trucks around and have their fans follow them on twitter. Here are four examples from other cities:
The Treats Truck
Big Gay Ice Cream Truck
Rickshaw Truck
Schnitzel Truck
This is what I am doing with Mobile Art Show August 5, 2009, but with visual art instead of food. Follow the truck's location that day on twitter and preview the art for sale in the truck on the website.

Photo Credit: "the big gay ice cream truck!," originally uploaded by finalgirl on flickr.