Today at around 3AM PST we suffered a failure on one of the server's hard drives. Everything seems to be working normally again with the exception of wiki sidebar styling and we are investigating this issue. If anyone notices anything wacky with the site now that we've brought it back online please drop a note in the Forum Bugs forum and we'll look into it. At first glance it seems we lost no data and there was no rollback of the database.
/gg FTW! Team