This update took place from 9:30am - 11:00am PST. It was originally supposed to end at 10:30, but was extended because "We're having a bit of a problem with one of the tools we use to push the build to the servers. (It was updated recently and the kinks are still being worked out of it.) This glitch is going to cost us about a half-hour of time, so the servers should be back up at about 11am Pacific." (Original post.)