MetaFilter is currently offline. We're working on the problem and will update here when we have more info.
Update(10:21PM Pacific): The database server is throwing serious errors, and has a failing hard drive. We're in the process of restoring from backups from about 8:40PM on a backup server to see if we can get things running there while the database server is being fixed.
(11:57PM): The database server has had its hard drive replaced, and we've restored from backups on a staging server successfully, but lost about an hour and a half worth of data before the drive died. We're now trying to see if we can bring the database server back online and the site soon after.
(12:57AM): The site is back, restored to 8:40PM Pacific. Thanks for your patience.
(1:24AM): Offline again until we work out some bugs.
(4:07AM): Site is back, restored to 7:40PM and running well again.
We're going to have two rounds of maintenance this week. The first is tonight (September 16th) at 11 PM Pacific for about ten minutes. The second will be tomorrow night (September 17th) at 11 PM Pacific for about five minutes.