If you want to send comments, ask questions, or just say "Hi", email is the best way to reach us. We read every email and forward it internally to the right department. We will do everything in our power to reply within 24 hours. If we take a little longer, don't worry, we're probably just about to reply or busy finding the best solution to your query.
Also check our Team page for more contact info.
2325 3rd Street
San Francisco, CA, 94107