You might also want to consider living in Oakland instead of San Francisco and taking BART to the city to work. My rent is 1/3 less and my commute (20 minutes door-to-door) is much shorter than that of many of my colleagues who live in the city.
Oakland is a big, heterogeneous city, with really nice districts that offer great dining, bars, and the usual city trappings.
Oakland is a big, heterogeneous city, with really nice districts that offer great dining, bars, and the usual city trappings.