If you need to get any multiplayer gaming in on your Xbox 360 today, make sure you do it before the clock strikes 12:01 AM PST. Xbox Live will be going down for maintenance tonight, for up to 24 hours.
As previously foretold, Microsoft's online gaming service will be taking a breather tonight, affecting the online functionality of your Xbox 360. So if you've got some epithets and rage quitting to do, get it done now. Don't expect anything new or exciting to be available to you when the service comes back. Just expect it to be back.