UPDATE 7:10pm PT: The issue is now resolved and websites are back up. The outage was caused by a network hardware failure at our data center, which has been replaced. Reports indicate that the outage lasted from 6:23pm to 7:04pm PT.
We are currently investigating reports that websites are unavailable. We thank you for your patience and apologize for the disruption. This post will be updated with more information as it becomes available.