Yep, Amoeba San Francisco is pretty massive.  I've been to the one in LA a few years ago and it seems the SF one is on the same vibe, BIG. The only downside was there were no listening stations for vinyl which I understand but very much dislike when trying to find records.  

I took home a few cool bits a pieces, check out the crazy Godzilla picture disc I scored!

!http://i74.photobucket.com/albums/i267/sampology/IMG_1537.jpg!

!http://i74.photobucket.com/albums/i267/sampology/IMG_1560.jpg!

!http://i74.photobucket.com/albums/i267/sampology/IMG_1577.jpg!

!http://i74.photobucket.com/albums/i267/sampology/IMG_1574.jpg! 