hey norcal-ers! i'm a los angeles chowhound traveling to sf in august. i saw the earlier post " Help wanted with a tentative itinerary for Yountville/Napa + SF in late August" but the choices are a bit pricey for me. what are the some CHEAP sf must-eats? looking for everything, but especially desserts. keep in mind, the food in la is awesome, so suggest places up to the challenge!