Also, in the interest of shameless self-promotion, I just launched an app that allows you to figure out which neighborhoods are most like your favorite Seattle neighborhoods. It works for both Oakland and SF. You can check it out on your phone at http://m.zofari.com. If you have any feedback, we'd love to to hear it.
You really need to visit and get a feel for yourself to see if its a good fit.
Here is a link to the various neighborhoods:
The other area you may want to consider is South Beach. Lots of young professionals and plenty of bars and restaurants there as well. I would spend some time in both and see what feels right to you.