I finally took the plunge and moved to San Fran (from Australia) to work on my startup. I've only been here a week and don't know anybody (gets kinda boring).
If you have some spare time, would love to meet new people. I'm staying in the bay area (specifically, SoMa). Happy to shout you a coffee, beer or food. You can leave a comment here or text me on 415-316-6144.
Andy.
I live about an hour South of SF, and I'm not able to get out of my house very often, so unfortunately, I can't take you up on the invitation.
There are a lot of tech-heavy meetup events, hacker spaces, user groups, and clubs around the area. A lot of it depends on your interests, everything from grubwithus, to the hacker dojo, to audrino clubs, to all sorts of software/user groups and hackathons. If you dig around in the `net, you'll find a lot more. Getting involved will help you meet others with similar interests.
Good luck!
What startup are you working on?