This is probably the best thing that happened to San Francisco. Well, may be not... ;-) but this bread is out of this world and you just gotta try it, if you still haven't done so and if you can get your hands on it. I've been eating it for more than a dozen years of my life but never appreciated it as much as I do now. It's awesomeeeee!!! Remember, next time you are in or around San Francisco, you just gotta try some SF signature sourdough bread.
Here are some of my favorite bakery locations (in random order) that sell sourdough breads: