Inspired by recent posts, thought it might be useful to compile a running list of URLs for the growing population of street food carts that are keeping an Internet presence to shout out their latest locations. Hopefully we can build a formal List working from this one. Go ahead and add any Bay Area cart via their Twitter/Facebook/wherever!
A few that have been mentioned by other posters so far:
Magic Curry: http://twitter.com/magiccurrykart
Amuse Bouche: http://twitter.com/AmuseBoucheSF
Creme Brulee: http://twitter.com/cremebruleecart