A nice article about moving to SF posted by Jason Evanish some months ago.
"I moved to San Francisco 9 months ago from the East Coast bastion of Boston. Despite having experience living in a major US city, I found quite a few surprises coming here. Some have been great, while others not so much. If you’re planning the move here, I hope this will help you know better what to expect. And if you already live in SF, this should give you a laugh or two and hopefully inspire you to leave a comment with anything I missed. Consider this the guide I wish someone had given me when I moved here..."