I want to post a very positive review of Sweet Marias coffee in Oakland. Last week I tried a pound of Sweet Marias espresso beans to use with my home machine and I was VERY impressed. The espresso bean's consistency and freshness was unrivaled. The espresso crema flowed beautifully from my machine day after day. So far I have tried Blue Bottle, Illy, and Sweet Marias. I know Blue Bottle gets a lot of attention, but Sweet Marias IMHO makes the best roasted espresso beans. Sweet Marias is currently an e-business and does not have any coffee kiosks.
Unfortunately I no longer live in the Bay Area :(, I recently moved to the Merced-Modesto area. I do come to San Francisco once a month. That is one reason I am ordering my beans through the internet.