Thanks for the info, everyone! I've emailed the Miki folks asking about bulk, and will check out Sigona.
As for Austin vs. Mountain View (and I'll keep it food-based, lest I come off like a boor), I know it's unfair to expect that the South Bay is going to be on par with Austin or SF, but I was so in love with the food scene in Austin (especially what has been popping up in the last few years), with all the amazing food trucks and unpretentious eateries serving innovative, affordable, locally sourced fare, new farmer's markets, etc. And going back to the bulk food issue, I can't wait to visit Austin in September and visit In.gredients, the country's first and only package-free/zero waste grocery store: http://in.gredients.com/ !!
I've just moved to Mountain View from Austin, and I try to buy my staples from the bulk section as much as possible. I've been to Sprouts, Whole Foods, Nob Hill, and a few other small stores, and the selection of bulk foods has been surprisingly bad. I can understand mustard powder not being available on every street corner, but the WF in Los Altos not even stocking bulk peanuts or bread flour??
I know I got spoiled in Austin, with the gigantic mothership WF being a mile from my house, but still. Can any chowhounds out there give me the inside scoop (haha) on where to find the best bulk selections -- preferably organic -- in Silicon Valley? Or am I doomed to have to go to Berkeley Bowl or Rainbow Grocery for such things?