I live in San Fran and I don’t have a car. How can I get to to Shoreline Amp. on a Sat. night via pub trans?

I'm going to a concert on 08/28/10 at Shoreline Amphitheatre in Mountain View, CA. As of next week, I will be living in San Francisco and I will not have a car. I would like to get to and from the show via public transportation. I hope this is not a problem because of the date (Saturday) and the relatively late time (show starting at 7-ending around 10 or so). Does anyone know how I can make it to this show using only public transportation?