We went to San Francisco by train. Amtrak really has a good deal, where it takes you down to Emeryville, across the bay from SF and then buses you to where you want to go in the City. I love the space on the train.
I had hoped to take some nice views of San Francisco as we got closer, but it was one of those days when the bridge was so socked in by grey that you could just barely see it if you squinted--and it would not have shown up on video at all. But I did take a couple of shots en route, just to give a flavor of the route. I love going under the Carquinez Bridge and seeing it tower above me!
This is a link to the flash version.