weee!!! I might feel the same way as my little blue friend at work today.
if you're planning to stay within the city and want to check out a place before you're head there. mapjack provide picture pretty much every street in San Francisco and move jack in the direction what you're looking. Play around with it you'll see what I mean. Mapjack available in San Francisco, Sausalito and Chaing Mai, Thailand for now.