Appetite for Life with Andrew Zimmern from the Travel Channel. Behind the scenes. the episode featured a handful of bay area food carts such as Adobo Hobo Cart, Soul Cocina, Magic Curry Cart, Creme Brule Cart, etc..This was filmed in August 2010 @ precita park in sf. The episode is called Homegrown Gourmet -
http://appetiteforlife.msn.com/#/episodes/1