We hope your evening plans didn't include a multiplayer session of Call of Duty: Modern Warfare 3, because according to Activision the Xbox Live matchmaking servers for both MW3 and Call of Duty: Black Ops are currently down. The outage started around an hour ago, and there's no ETA yet as to when the services will be back up. With both Activision and Xbox support acknowledging the issue, however, we imagine they'll be up and running as soon as possible. Of course, that's likely little comfort for those missing out on the latest free XP weekend. We'll keep you posted as soon as we hear more.

Thanks, br14n!

Update: It appears the night's troubles are over. Even better, Infinity Ward's Robert Bowling has suggested the company may extend the Double XP weekend to make up for the evening's problems.