Headed to San Francisco: Will Code for Food

I'm finally going to get out of Europe for the first time in my life. I'll be in and around San Francisco for two weeks at the end of September. Hints and tips for must-see and must-do things will be gratefully received!

If anyone wants to meet up and hang out with two friendly cheerful British lads, or if you can put us up for a couple of nights in exchange for good company and a few beers, let me know. I can but ask...