There have been a few inquiries here about where to get cupcakes in the Bay Area. I just learned of Sibby's Cupcakery, which is evidently located in Palo Alto but delivers to points North and to the East Bay.
In perusing her site, I found the flavors pretty mouthwatering. I don't have any relationship to Sibby's, nor have I tried the cupcakes myself. Perhaps someone here will report back.