http://server.berkeley.edu/Transit/Other/bike.html
What Daniel Gildea is really saying is that if you want to ride to work in the Bay Area, you can. His Bicycle Commuter's Guide includes detailed directions for crossing major bridges; bringing bicycles on ferries, BART, buses, and trains; and pointers to local transit authority schedules, such as BART and CalTrain. For more information, link to any of the nonprofit groups here (such as RIDES for Bay Area Commuters), or join a local mailing list.