Central computers just opened a store almost right across the road from the Sunnyvale Fry's.
I haven't been to Anchor yet but several of my ham radio friends have recommended it.
Jameco in San Carlos also has a lot of components. It's not a retail store, other than a small display up front of mostly closeout stuff, but you can order online for will call and they will have it ready by the time you get there.
One more Bay Area source I like a lot is SF Cable. As you can guess, they have mostly cables. The ones I've bought from them have been good quality at a good price. I particularly like their flat Cat 6 Ethernet cables. I don't think they have a retail store at all, but if you're in the Bay Area it's overnight shipping.
In fact, for my home-built machines, I typically buy them at Central, who will assemble the CPU, RAM, and Motherboard, showign that it POSTs (I've had plenty of times when I've purchased what I thought was a compatible group of hardware that wasn't).
I have to say too that the San Jose store has smelled horrid the last year due to what seems like super old carpet smell. If they won't even pay to clean their carpet they don't deserve to be in business.