October 26, 2009, 6:45 pm - Valve - General Announcement
The Steam Users' Forums will be unavailable for two to three hours tonight starting at 9PM PDT while we perform some hardware upgrades. We'll work to keep the downtime as short as possible.
Update: The maintenance is complete as of 10:30PM PDT, though some users may continue to be unable to access the forums during the next twenty minutes or so while DNS changes propagate. Thank you for your patience.