With Norwegian flying London - Oakland, and the link up with the BART making it potentially even faster to get to Embarcadero, it's a really great option over SFO!
Yup; You can get nonstop from Oakland to Reykjavik (KEF) and also Stockholm (ARN) I believe. No doubt Norwegian also flies OAK to somewhere in Norway.
They even have a cute little lounge there for the premium passengers nowadays (shared with BA; a couple of flights a week to London Gatwick).